diff --git a/app/models/validation_request.rb b/app/models/validation_request.rb
index 3473df784b..eab383e7f0 100644
--- a/app/models/validation_request.rb
+++ b/app/models/validation_request.rb
@@ -16,6 +16,8 @@ class ValidationRequest < ApplicationRecord
     TimeExtensionValidationRequest
   ].freeze
 
+  REQUEST_TYPE_MAP = REQUEST_TYPES.index_by { |type| type[0..-18].underscore }.freeze
+
   with_options to: :planning_application do
     delegate :audits
     delegate :validated?, prefix: :planning_application
@@ -122,8 +124,12 @@ def grouped_by_type
     end
   end
 
+  def type_param
+    type[0..-18].underscore
+  end
+
   def type_symbol
-    type.underscore.gsub(/_validation_request\z/, "").to_sym
+    type_param.to_sym
   end
 
   def response_due
diff --git a/bin/brakeman b/bin/brakeman
new file mode 100755
index 0000000000..a2eeb02f0c
--- /dev/null
+++ b/bin/brakeman
@@ -0,0 +1,16 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+#
+# This file was generated by Bundler.
+#
+# The application 'brakeman' is installed as part of a gem, and
+# this file is here to facilitate running it.
+#
+
+ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../Gemfile", __dir__)
+
+require "rubygems"
+require "bundler/setup"
+
+load Gem.bin_path("brakeman", "brakeman")
diff --git a/config/brakeman.ignore b/config/brakeman.ignore
index 8e69c40a3e..dbdd167ff7 100644
--- a/config/brakeman.ignore
+++ b/config/brakeman.ignore
@@ -7,7 +7,7 @@
       "check_name": "VerbConfusion",
       "message": "Potential HTTP verb confusion. `HEAD` is routed like `GET` but `request.get?` will return `false`",
       "file": "engines/bops_core/app/controllers/concerns/bops_core/application_controller.rb",
-      "line": 98,
+      "line": 128,
       "link": "https://brakemanscanner.org/docs/warning_types/http_verb_confusion/",
       "code": "session[:back_path] = request.referer if request.get?",
       "render_path": null,
@@ -57,6 +57,40 @@
       ],
       "note": ""
     },
+    {
+      "warning_type": "Dynamic Render Path",
+      "warning_code": 15,
+      "fingerprint": "5240d450204c9e3b74401ae28b8c08ad7dc4788ca35f31cfe0a56b8fa6005635",
+      "check_name": "Render",
+      "message": "Render path contains parameter value",
+      "file": "engines/bops_preapps/app/views/bops_preapps/validation_requests/cancellations/new.html.erb",
+      "line": 2,
+      "link": "https://brakemanscanner.org/docs/warning_types/dynamic_render_path/",
+      "code": "render(action => \"#{controller_path}/new/#{PlanningApplicationPresenter.new(view_context, current_local_authority.planning_applications.find_by!(:reference => params[:reference])).validation_requests.find(params[:validation_request_id]).type_param}\", {})",
+      "render_path": [
+        {
+          "type": "controller",
+          "class": "BopsPreapps::ValidationRequests::CancellationsController",
+          "method": "create",
+          "line": 36,
+          "file": "engines/bops_preapps/app/controllers/bops_preapps/validation_requests/cancellations_controller.rb",
+          "rendered": {
+            "name": "bops_preapps/validation_requests/cancellations/new",
+            "file": "engines/bops_preapps/app/views/bops_preapps/validation_requests/cancellations/new.html.erb"
+          }
+        }
+      ],
+      "location": {
+        "type": "template",
+        "template": "bops_preapps/validation_requests/cancellations/new"
+      },
+      "user_input": "params[:validation_request_id]",
+      "confidence": "Weak",
+      "cwe_id": [
+        22
+      ],
+      "note": ""
+    },
     {
       "warning_type": "Denial of Service",
       "warning_code": 76,
@@ -64,7 +98,7 @@
       "check_name": "RegexDoS",
       "message": "Parameter value used in regular expression",
       "file": "app/controllers/application_controller.rb",
-      "line": 48,
+      "line": 55,
       "link": "https://brakemanscanner.org/docs/warning_types/denial_of_service/",
       "code": "/\\/#{get_planning_application(params[planning_application_param]).id}/",
       "render_path": null,
@@ -82,46 +116,36 @@
       "note": ""
     },
     {
-      "warning_type": "Cross-Site Scripting",
-      "warning_code": 2,
-      "fingerprint": "98a2eb7517c9b0fbbbb711af14b9eb2241ece8b3b375dc85bc30d394a659a0f5",
-      "check_name": "CrossSiteScripting",
-      "message": "Unescaped parameter value",
-      "file": "app/views/planning_applications/site_notices/_status.html.erb",
-      "line": 23,
-      "link": "https://brakemanscanner.org/docs/warning_types/cross_site_scripting",
-      "code": "PlanningApplicationPresenter.new(view_context, get_planning_application(params[planning_application_param])).last_site_notice.preview_content",
+      "warning_type": "Dynamic Render Path",
+      "warning_code": 15,
+      "fingerprint": "afeab00e1d4d52748bb9e6533d9761489e90595357a5f6ad2166530f1817d400",
+      "check_name": "Render",
+      "message": "Render path contains parameter value",
+      "file": "engines/bops_preapps/app/views/bops_preapps/validation_requests/edit.html.erb",
+      "line": 2,
+      "link": "https://brakemanscanner.org/docs/warning_types/dynamic_render_path/",
+      "code": "render(action => \"#{controller_path}/edit/#{PlanningApplicationPresenter.new(view_context, current_local_authority.planning_applications.find_by!(:reference => params[:reference])).validation_requests.find(params[:id]).type_param}\", {})",
       "render_path": [
         {
           "type": "controller",
-          "class": "PlanningApplications::SiteNoticesController",
-          "method": "create",
+          "class": "BopsPreapps::ValidationRequestsController",
+          "method": "update",
           "line": 54,
-          "file": "app/controllers/planning_applications/site_notices_controller.rb",
+          "file": "engines/bops_preapps/app/controllers/bops_preapps/validation_requests_controller.rb",
           "rendered": {
-            "name": "planning_applications/site_notices/new",
-            "file": "app/views/planning_applications/site_notices/new.html.erb"
-          }
-        },
-        {
-          "type": "template",
-          "name": "planning_applications/site_notices/new",
-          "line": 22,
-          "file": "app/views/planning_applications/site_notices/new.html.erb",
-          "rendered": {
-            "name": "planning_applications/site_notices/_status",
-            "file": "app/views/planning_applications/site_notices/_status.html.erb"
+            "name": "bops_preapps/validation_requests/edit",
+            "file": "engines/bops_preapps/app/views/bops_preapps/validation_requests/edit.html.erb"
           }
         }
       ],
       "location": {
         "type": "template",
-        "template": "planning_applications/site_notices/_status"
+        "template": "bops_preapps/validation_requests/edit"
       },
-      "user_input": "params[planning_application_param]",
+      "user_input": "params[:id]",
       "confidence": "Weak",
       "cwe_id": [
-        79
+        22
       ],
       "note": ""
     },
@@ -158,6 +182,40 @@
         22
       ],
       "note": ""
+    },
+    {
+      "warning_type": "Dynamic Render Path",
+      "warning_code": 15,
+      "fingerprint": "df3f134a8f88aadd7d08404d76efb177eef78b6f38546392f66e0dba8b39a71d",
+      "check_name": "Render",
+      "message": "Render path contains parameter value",
+      "file": "engines/bops_preapps/app/views/bops_preapps/validation_requests/new.html.erb",
+      "line": 2,
+      "link": "https://brakemanscanner.org/docs/warning_types/dynamic_render_path/",
+      "code": "render(action => \"#{controller_path}/new/#{PlanningApplicationPresenter.new(view_context, current_local_authority.planning_applications.find_by!(:reference => params[:reference])).validation_requests.new(:type => request_type).type_param}\", {})",
+      "render_path": [
+        {
+          "type": "controller",
+          "class": "BopsPreapps::ValidationRequestsController",
+          "method": "create",
+          "line": 30,
+          "file": "engines/bops_preapps/app/controllers/bops_preapps/validation_requests_controller.rb",
+          "rendered": {
+            "name": "bops_preapps/validation_requests/new",
+            "file": "engines/bops_preapps/app/views/bops_preapps/validation_requests/new.html.erb"
+          }
+        }
+      ],
+      "location": {
+        "type": "template",
+        "template": "bops_preapps/validation_requests/new"
+      },
+      "user_input": "params[:reference]",
+      "confidence": "Weak",
+      "cwe_id": [
+        22
+      ],
+      "note": ""
     }
   ],
   "brakeman_version": "7.0.0"
diff --git a/engines/bops_preapps/app/controllers/bops_preapps/validation_requests/cancellations_controller.rb b/engines/bops_preapps/app/controllers/bops_preapps/validation_requests/cancellations_controller.rb
new file mode 100644
index 0000000000..f39f5bad26
--- /dev/null
+++ b/engines/bops_preapps/app/controllers/bops_preapps/validation_requests/cancellations_controller.rb
@@ -0,0 +1,86 @@
+# frozen_string_literal: true
+
+module BopsPreapps
+  module ValidationRequests
+    class CancellationsController < AuthenticationController
+      before_action :set_layout
+      before_action :set_planning_application
+      before_action :set_case_record
+      before_action :set_validation_request
+
+      before_action :ensure_request_is_cancelable
+
+      helper_method :task_redirect_path
+
+      def new
+        respond_to do |format|
+          format.html
+        end
+      end
+
+      def create
+        @validation_request.assign_attributes(validation_request_params)
+        @validation_request.cancel_request!
+
+        if @planning_application.validation_complete?
+          @validation_request.send_cancelled_validation_request_mail
+        end
+
+        respond_to do |format|
+          format.html do
+            redirect_to task_redirect_path, notice: t(".#{@validation_request.type_param}")
+          end
+        end
+      rescue ValidationRequest::RecordCancelError
+        respond_to do |format|
+          format.html { render :new }
+        end
+      end
+
+      private
+
+      def set_layout
+        @show_header_bar = true
+        @show_sidebar = true
+      end
+
+      def set_planning_application
+        scope = current_local_authority.planning_applications
+        planning_application = scope.find_by!(reference: params[:reference])
+
+        @planning_application = PlanningApplicationPresenter.new(view_context, planning_application)
+      end
+
+      def set_case_record
+        @case_record = @planning_application.case_record
+      end
+
+      def set_validation_request
+        @validation_request = @planning_application.validation_requests.find(params[:validation_request_id])
+      end
+
+      def validation_request_params
+        params.require(:validation_request).permit(:cancel_reason)
+      end
+
+      def task_redirect_lookup(scope)
+        scope = "bops_preapps.validation_requests.#{scope}"
+        t(@validation_request.type_symbol, scope: scope.to_sym)
+      end
+
+      def task_redirect_slug
+        task_redirect_lookup("redirect_slugs")
+      end
+
+      def task_redirect_path
+        task_path(@planning_application, task_redirect_slug)
+      end
+
+      def ensure_request_is_cancelable
+        unless @validation_request.open_or_pending? && @planning_application.validation_complete?
+          redirect_to task_redirect_path, alert: t(".validation_request_not_cancelable")
+        end
+      end
+    end
+  end
+end
diff --git a/engines/bops_preapps/app/controllers/bops_preapps/validation_requests_controller.rb b/engines/bops_preapps/app/controllers/bops_preapps/validation_requests_controller.rb
new file mode 100644
index 0000000000..c3339707f9
--- /dev/null
+++ b/engines/bops_preapps/app/controllers/bops_preapps/validation_requests_controller.rb
@@ -0,0 +1,157 @@
+# frozen_string_literal: true
+
+module BopsPreapps
+  class ValidationRequestsController < AuthenticationController
+    before_action :set_layout
+    before_action :set_planning_application
+    before_action :set_case_record
+    before_action :set_validation_request, except: %i[new create]
+    before_action :build_validation_request, only: %i[new create]
+
+    before_action :ensure_request_is_createable, only: %i[new create]
+    before_action :ensure_request_is_editable, only: %i[edit update]
+    before_action :ensure_request_is_destroyable, only: %i[destroy]
+
+    helper_method :task_redirect_path
+
+    def new
+      respond_to do |format|
+        format.html
+      end
+    end
+
+    def create
+      respond_to do |format|
+        if @validation_request.save
+          format.html do
+            redirect_to task_redirect_path, notice: task_redirect_notice
+          end
+        else
+          format.html { render :new }
+        end
+      end
+    end
+
+    def show
+      respond_to do |format|
+        format.html
+      end
+    end
+
+    def edit
+      respond_to do |format|
+        format.html
+      end
+    end
+
+    def update
+      respond_to do |format|
+        if @validation_request.update(validation_request_params)
+          format.html do
+            redirect_to task_redirect_path, notice: task_redirect_notice
+          end
+        else
+          format.html { render :edit }
+        end
+      end
+    end
+
+    def destroy
+      respond_to do |format|
+        if @validation_request.destroy
+          format.html do
+            redirect_to task_redirect_path, notice: task_redirect_notice
+          end
+        else
+          format.html do
+            redirect_to task_redirect_path, alert: task_redirect_alert
+          end
+        end
+      end
+    end
+
+    private
+
+    def set_layout
+      @show_header_bar = true
+      @show_sidebar = true
+    end
+
+    def set_planning_application
+      scope = current_local_authority.planning_applications
+      planning_application = scope.find_by!(reference: params[:reference])
+
+      @planning_application = PlanningApplicationPresenter.new(view_context, planning_application)
+    end
+
+    def set_case_record
+      @case_record = @planning_application.case_record
+    end
+
+    def set_validation_request
+      @validation_request = @planning_application.validation_requests.find(params[:id])
+    end
+
+    def request_type
+      ValidationRequest::REQUEST_TYPE_MAP.fetch(params.fetch(:type))
+    rescue KeyError
+      raise BopsCore::Errors::BadRequestError, "Invalid validation request type"
+    end
+
+    def build_validation_request
+      @validation_request = @planning_application.validation_requests.new(type: request_type)
+
+      if action_name == "create"
+        @validation_request.assign_attributes(validation_request_params)
+      end
+    end
+
+    def validation_request_attributes
+      scope = "bops_preapps.validation_requests.attributes"
+      t(@validation_request.type_symbol, scope: scope.to_sym)
+    end
+
+    def validation_request_params
+      params.require(:validation_request).permit(*validation_request_attributes).merge(user: current_user)
+    end
+
+    def task_redirect_lookup(scope)
+      scope = "bops_preapps.validation_requests.#{scope}"
+      t(@validation_request.type_symbol, scope: scope.to_sym)
+    end
+
+    def task_redirect_notice
+      task_redirect_lookup("redirect_notices.#{action_name}")
+    end
+
+    def task_redirect_alert
+      task_redirect_lookup("redirect_alerts.#{action_name}")
+    end
+
+    def task_redirect_slug
+      task_redirect_lookup("redirect_slugs")
+    end
+
+    def task_redirect_path
+      task_path(@planning_application, task_redirect_slug)
+    end
+
+    def ensure_request_is_createable
+      if @planning_application.validated?
+        redirect_to task_redirect_path, alert: t(".validation_request_not_createable")
+      end
+    end
+
+    def ensure_request_is_editable
+      unless @planning_application.not_started?
+        redirect_to task_redirect_path, alert: t(".validation_request_not_editable")
+      end
+    end
+
+    def ensure_request_is_destroyable
+      unless @planning_application.not_started?
+        redirect_to task_redirect_path, alert: t(".validation_request_not_destroyable")
+      end
+    end
+  end
+end
diff --git a/engines/bops_preapps/app/forms/bops_preapps/tasks/other_validation_requests_form.rb b/engines/bops_preapps/app/forms/bops_preapps/tasks/other_validation_requests_form.rb
index f0a372ddd6..79dd332395 100644
--- a/engines/bops_preapps/app/forms/bops_preapps/tasks/other_validation_requests_form.rb
+++ b/engines/bops_preapps/app/forms/bops_preapps/tasks/other_validation_requests_form.rb
@@ -10,12 +10,27 @@ def created_by
 
         def status
           case state
+          when "pending"
+            "Not sent yet"
+          when "open"
+            overdue? ? "Overdue" : "Sent"
           when "closed"
-            :updated
+            "Responded"
           when "cancelled"
-            :cancelled
-          else
-            :invalid
+            "Cancelled"
+          end
+        end
+
+        def status_colour
+          case state
+          when "pending"
+            "yellow"
+          when "open"
+            overdue? ? "red" : "green"
+          when "closed"
+            nil
+          when "cancelled"
+            "red"
           end
         end
       end
diff --git a/engines/bops_preapps/app/views/bops_preapps/tasks/check-and-validate/other-validation-issues/other-validation-requests/show.html.erb b/engines/bops_preapps/app/views/bops_preapps/tasks/check-and-validate/other-validation-issues/other-validation-requests/show.html.erb
index b384279088..8b86aa87a8 100644
--- a/engines/bops_preapps/app/views/bops_preapps/tasks/check-and-validate/other-validation-issues/other-validation-requests/show.html.erb
+++ b/engines/bops_preapps/app/views/bops_preapps/tasks/check-and-validate/other-validation-issues/other-validation-requests/show.html.erb
@@ -17,14 +17,14 @@
         <% @form.each_validation_request do |validation_request| %>
           <tr class="govuk-table__row">
             <td class="govuk-table__cell">
-              <%= govuk_link_to(main_app.planning_application_validation_validation_request_path(@planning_application, validation_request)) do %>
+              <%= govuk_link_to(validation_request_path(@planning_application, validation_request)) do %>
                 <%= truncate(validation_request.reason, length: 50) %>
               <% end %>
             </td>
             <td class="govuk-table__cell"><%= truncate(validation_request.suggestion, length: 50) %></td>
             <td class="govuk-table__cell"><%= validation_request.created_by %></td>
             <td class="govuk-table__cell govuk-!-text-align-right">
-              <%= render(StatusTags::BaseComponent.new(status: validation_request.status)) %>
+              <%= govuk_tag(text: validation_request.status, colour: validation_request.status_colour) %>
             </td>
           </tr>
         <% end %>
@@ -38,9 +38,9 @@
     </div>
   <% end %>
 
-  <% unless @planning_application.determined? %>
+  <% unless @planning_application.validated? %>
     <p class="govuk-!-margin-bottom-9">
-      <%= govuk_link_to "Add other validation request", main_app.new_planning_application_validation_validation_request_path(@planning_application, type: "other_change") %>
+      <%= govuk_link_to "Add other validation request", new_validation_request_path(@planning_application, type: "other_change") %>
     </p>
   <% end %>
 
diff --git a/engines/bops_preapps/app/views/bops_preapps/validation_requests/_breadcrumbs.html.erb b/engines/bops_preapps/app/views/bops_preapps/validation_requests/_breadcrumbs.html.erb
new file mode 100644
index 0000000000..d4255232de
--- /dev/null
+++ b/engines/bops_preapps/app/views/bops_preapps/validation_requests/_breadcrumbs.html.erb
@@ -0,0 +1,3 @@
+<% add_parent_breadcrumb_link "Home", preapp_home_path %>
+<% add_parent_breadcrumb_link "Application", main_app.planning_application_path(@planning_application) %>
+<% add_parent_breadcrumb_link "Validation", main_app.planning_application_validation_tasks_path(@planning_application) %>
diff --git a/engines/bops_preapps/app/views/bops_preapps/validation_requests/cancellations/new.html.erb b/engines/bops_preapps/app/views/bops_preapps/validation_requests/cancellations/new.html.erb
new file mode 100644
index 0000000000..86fb2b42aa
--- /dev/null
+++ b/engines/bops_preapps/app/views/bops_preapps/validation_requests/cancellations/new.html.erb
@@ -0,0 +1,2 @@
+<%= render "bops_preapps/validation_requests/breadcrumbs" %>
+<%= render "#{controller_path}/new/#{@validation_request.type_param}" %>
diff --git a/engines/bops_preapps/app/views/bops_preapps/validation_requests/cancellations/new/_other_change.html.erb b/engines/bops_preapps/app/views/bops_preapps/validation_requests/cancellations/new/_other_change.html.erb
new file mode 100644
index 0000000000..66f92e7ec4
--- /dev/null
+++ b/engines/bops_preapps/app/views/bops_preapps/validation_requests/cancellations/new/_other_change.html.erb
@@ -0,0 +1,37 @@
+<% content_for :page_title do %>
+  Cancel other validation request &mdash; <%= t("page_title") %>
+<% end %>
+
+<%= form_with model: @validation_request, scope: :validation_request, method: :post, url: validation_request_cancellation_path(@planning_application) do |form| %>
+  <%= form.govuk_error_summary %>
+
+  <h1>Cancel validation request</h1>
+  <%= render "shared/proposal_header" %>
+
+  <div class="govuk-grid-row govuk-!-margin-top-3">
+    <div class="govuk-grid-column-two-thirds">
+      <h2 class="govuk-!-margin-bottom-3">
+        Other request to be cancelled
+      </h2>
+
+      <div class="govuk-inset-text govuk-!-margin-top-3">
+        <h3 class="govuk-!-margin-bottom-1">Reason it is invalid:</h3>
+        <%= render(FormattedContentComponent.new(text: @validation_request.reason)) %>
+
+        <h3 class="govuk-!-margin-bottom-1">How it can be made valid:</h3>
+        <%= render(FormattedContentComponent.new(text: @validation_request.suggestion)) %>
+
+        <p>
+          <%= @validation_request.created_at.to_fs %>
+        </p>
+      </div>
+
+      <%= form.govuk_text_area(:cancel_reason, rows: 5,
+            label: {size: "m", text: "Explain to the applicant why this request is being cancelled"}) %>
+
+      <%= form.govuk_submit "Confirm cancellation" do %>
+        <%= govuk_button_link_to "Back", task_redirect_path, secondary: true %>
+      <% end %>
+    </div>
+  </div>
+<% end %>
diff --git a/engines/bops_preapps/app/views/bops_preapps/validation_requests/edit.html.erb b/engines/bops_preapps/app/views/bops_preapps/validation_requests/edit.html.erb
new file mode 100644
index 0000000000..bfa38ca755
--- /dev/null
+++ b/engines/bops_preapps/app/views/bops_preapps/validation_requests/edit.html.erb
@@ -0,0 +1,2 @@
+<%= render "breadcrumbs" %>
+<%= render "#{controller_path}/edit/#{@validation_request.type_param}" %>
diff --git a/engines/bops_preapps/app/views/bops_preapps/validation_requests/edit/_other_change.html.erb b/engines/bops_preapps/app/views/bops_preapps/validation_requests/edit/_other_change.html.erb
new file mode 100644
index 0000000000..dc3b22ebfe
--- /dev/null
+++ b/engines/bops_preapps/app/views/bops_preapps/validation_requests/edit/_other_change.html.erb
@@ -0,0 +1,27 @@
+<% content_for :page_title do %>
+  Update other validation request &mdash; <%= t("page_title") %>
+<% end %>
+
+<%= form_with model: @validation_request, scope: :validation_request, url: validation_request_path(@planning_application) do |form| %>
+  <%= form.govuk_error_summary %>
+
+  <h1>Request other validation change</h1>
+  <%= render "shared/proposal_header" %>
+
+  <div class="govuk-grid-row govuk-!-margin-top-3">
+    <div class="govuk-grid-column-two-thirds">
+      <%= hidden_field_tag :type, "other_change" %>
+
+      <%= form.govuk_text_area(:reason, rows: 5,
+            label: {size: "m", text: "Tell the applicant another reason why the application is invalid"}) %>
+
+      <%= form.govuk_text_area(:suggestion, rows: 5,
+            hint: {text: "Add all information that they will need to complete this action"},
+            label: {size: "m", text: "Explain to the applicant how the application can be made valid"}) %>
+
+      <%= form.govuk_submit "Update request" do %>
+        <%= govuk_button_link_to "Back", task_redirect_path, secondary: true %>
+      <% end %>
+    </div>
+  </div>
+<% end %>
diff --git a/engines/bops_preapps/app/views/bops_preapps/validation_requests/new.html.erb b/engines/bops_preapps/app/views/bops_preapps/validation_requests/new.html.erb
new file mode 100644
index 0000000000..b9112753da
--- /dev/null
+++ b/engines/bops_preapps/app/views/bops_preapps/validation_requests/new.html.erb
@@ -0,0 +1,2 @@
+<%= render "breadcrumbs" %>
+<%= render "#{controller_path}/new/#{@validation_request.type_param}" %>
diff --git a/engines/bops_preapps/app/views/bops_preapps/validation_requests/new/_other_change.html.erb b/engines/bops_preapps/app/views/bops_preapps/validation_requests/new/_other_change.html.erb
new file mode 100644
index 0000000000..5a74774c96
--- /dev/null
+++ b/engines/bops_preapps/app/views/bops_preapps/validation_requests/new/_other_change.html.erb
@@ -0,0 +1,33 @@
+<% content_for :page_title do %>
+  Other validation request &mdash; <%= t("page_title") %>
+<% end %>
+
+<%= form_with model: @validation_request, scope: :validation_request, url: validation_requests_path(@planning_application) do |form| %>
+  <%= form.govuk_error_summary %>
+
+  <h1>Request other validation change</h1>
+  <%= render "shared/proposal_header" %>
+
+  <div class="govuk-grid-row govuk-!-margin-top-3">
+    <div class="govuk-grid-column-two-thirds">
+      <%= hidden_field_tag :type, "other_change" %>
+
+      <%= form.govuk_text_area(:reason, rows: 5,
+            label: {size: "m", text: "Tell the applicant another reason why the application is invalid"}) %>
+
+      <%= form.govuk_text_area(:suggestion, rows: 5,
+            hint: {text: "Add all information that they will need to complete this action"},
+            label: {size: "m", text: "Explain to the applicant how the application can be made valid"}) %>
+
+      <% if @planning_application.not_started? %>
+        <%= form.govuk_submit "Save request" do %>
+          <%= govuk_button_link_to "Back", task_redirect_path, secondary: true %>
+        <% end %>
+      <% else %>
+        <%= form.govuk_submit "Send request" do %>
+          <%= govuk_button_link_to "Back", task_redirect_path, secondary: true %>
+        <% end %>
+      <% end %>
+    </div>
+  </div>
+<% end %>
diff --git a/engines/bops_preapps/app/views/bops_preapps/validation_requests/show.html.erb b/engines/bops_preapps/app/views/bops_preapps/validation_requests/show.html.erb
new file mode 100644
index 0000000000..d46e37dcf4
--- /dev/null
+++ b/engines/bops_preapps/app/views/bops_preapps/validation_requests/show.html.erb
@@ -0,0 +1,2 @@
+<%= render "breadcrumbs" %>
+<%= render "#{controller_path}/show/#{@validation_request.type_param}" %>
diff --git a/engines/bops_preapps/app/views/bops_preapps/validation_requests/show/_other_change.html.erb b/engines/bops_preapps/app/views/bops_preapps/validation_requests/show/_other_change.html.erb
new file mode 100644
index 0000000000..08d8456bc1
--- /dev/null
+++ b/engines/bops_preapps/app/views/bops_preapps/validation_requests/show/_other_change.html.erb
@@ -0,0 +1,64 @@
+<% content_for :page_title do %>
+  Other validation request &mdash; <%= t("page_title") %>
+<% end %>
+
+<h1>
+  <% if @validation_request.closed? %>
+    Check the response to other request
+  <% else %>
+    View other request
+  <% end %>
+</h1>
+<%= render "shared/proposal_header" %>
+
+<div class="govuk-grid-row govuk-!-margin-top-3">
+  <div class="govuk-grid-column-two-thirds">
+    <h2 class="govuk-!-margin-bottom-3">Officer request</h2>
+
+    <div class="govuk-inset-text govuk-!-margin-top-3">
+      <h3 class="govuk-!-margin-bottom-1">Reason it is invalid:</h3>
+      <%= render(FormattedContentComponent.new(text: @validation_request.reason)) %>
+
+      <h3 class="govuk-!-margin-bottom-1">How it can be made valid:</h3>
+      <%= render(FormattedContentComponent.new(text: @validation_request.suggestion)) %>
+
+      <p>
+        <%= @validation_request.created_at.to_fs %>
+      </p>
+    </div>
+
+    <h2 class="govuk-!-margin-bottom-3">Applicant response</h2>
+
+    <div class="govuk-inset-text govuk-!-margin-top-3">
+      <% if @validation_request.closed? %>
+        <%= render(FormattedContentComponent.new(text: @validation_request.response)) %>
+
+        <p>
+          <%= @validation_request.updated_at.to_fs %>
+        </p>
+      <% else %>
+        <p>Applicant has not responded yet</p>
+      <% end %>
+    </div>
+
+    <% if @validation_request.open_or_pending? %>
+      <% if @planning_application.not_started? %>
+        <div class="govuk-button-group govuk-!-margin-top-6">
+          <%= govuk_button_to "Delete request", validation_request_path(@planning_application, @validation_request), secondary: true, method: :delete, data: {confirm: "Are you sure?"} %>
+        </div>
+      <% elsif @planning_application.validation_complete? %>
+        <div class="govuk-button-group govuk-!-margin-top-6">
+          <%= govuk_button_link_to "Cancel request", new_validation_request_cancellation_path(@planning_application, @validation_request), secondary: true %>
+        </div>
+      <% end %>
+    <% end %>
+
+    <div class="govuk-button-group govuk-!-margin-top-6">
+      <%= govuk_button_link_to "Back", task_redirect_path, secondary: true %>
+
+      <% if @planning_application.not_started? %>
+        <%= govuk_link_to "Edit request", edit_validation_request_path(@planning_application, @validation_request) %>
+      <% end %>
+    </div>
+  </div>
+</div>
diff --git a/engines/bops_preapps/config/locales/en.yml b/engines/bops_preapps/config/locales/en.yml
index 60e4c3ad6f..e0a6e9a37a 100644
--- a/engines/bops_preapps/config/locales/en.yml
+++ b/engines/bops_preapps/config/locales/en.yml
@@ -133,6 +133,39 @@ en:
         summary-of-advice:
           failure: Failed to save summary of advice
           success: Summary of advice successfully updated
+    validation_requests:
+      attributes:
+        other_change:
+        - :reason
+        - :suggestion
+      cancellations:
+        create:
+          other_change: Change request successfully cancelled.
+          validation_request_not_cancelable: Validation request can't be cancelled.
+        new:
+          validation_request_not_cancelable: Validation request can't be cancelled.
+      create:
+        validation_request_not_createable: Validation requests can't be added.
+      destroy:
+        validation_request_not_destroyable: The validation request can't be deleted.
+      edit:
+        validation_request_not_editable: The validation request can't be edited.
+      new:
+        validation_request_not_createable: Validation requests can't be added.
+      redirect_alerts:
+        destroy:
+          other_change: Couldn't delete validation request — please contact support.
+      redirect_notices:
+        create:
+          other_change: Change request successfully created.
+        destroy:
+          other_change: Change request successfully deleted.
+        update:
+          other_change: Change request successfully updated.
+      redirect_slugs:
+        other_change: check-and-validate/other-validation-issues/other-validation-requests
+      update:
+        validation_request_not_editable: The validation request can't be edited.
   shared:
     task_submit_buttons:
       save_draft: Save changes
diff --git a/engines/bops_preapps/config/routes.rb b/engines/bops_preapps/config/routes.rb
index 4c31d01be6..d3f468709e 100644
--- a/engines/bops_preapps/config/routes.rb
+++ b/engines/bops_preapps/config/routes.rb
@@ -9,6 +9,10 @@
   scope "/:reference" do
     get "/", to: redirect("/planning_applications/%{reference}")
 
+    resources :validation_requests, path: "/validation/requests", except: %i[index] do
+      resource :cancellation, only: %i[new create], module: "validation_requests"
+    end
+
     get "/cancel", to: "cancel_requests#show", as: :cancel_request
     patch "/cancel", to: "cancel_requests#update"
     get "/*slug/edit", to: "tasks#edit", as: :edit_task
diff --git a/engines/bops_preapps/spec/system/tasks/other_validation_requests_spec.rb b/engines/bops_preapps/spec/system/tasks/other_validation_requests_spec.rb
new file mode 100644
index 0000000000..3b7b99d910
--- /dev/null
+++ b/engines/bops_preapps/spec/system/tasks/other_validation_requests_spec.rb
@@ -0,0 +1,729 @@
+# frozen_string_literal: true
+
+require "rails_helper"
+
+RSpec.describe "Other validation requests", type: :system do
+  let(:local_authority) { create(:local_authority, :default) }
+  let(:reference) { planning_application.reference }
+  let(:case_record) { planning_application.case_record }
+  let(:slug) { "check-and-validate/other-validation-issues/other-validation-requests" }
+  let(:task) { case_record.find_task_by_slug_path!(slug) }
+
+  let(:user) { create(:user, local_authority:, name: "Vlad Idator") }
+
+  before do
+    sign_in(user)
+    visit "/planning_applications/#{planning_application.reference}/validation/tasks"
+  end
+
+  context "when the application has not started" do
+    let(:planning_application) { create(:planning_application, :not_started, :pre_application, local_authority:) }
+
+    it "a validation request can be added" do
+      within ".bops-sidebar" do
+        click_link "Other validation requests"
+      end
+
+      expect(page).to have_current_path("/preapps/#{reference}/check-and-validate/other-validation-issues/other-validation-requests")
+      expect(page).to have_selector("h1", text: "Other validation requests")
+      expect(page).to have_content("No other validation requests have been added")
+
+      click_link "Add other validation request"
+      expect(page).to have_selector("h1", text: "Request other validation change")
+
+      fill_in "Tell the applicant another reason why the application is invalid", with: "Reason for invalidation"
+      fill_in "Explain to the applicant how the application can be made valid", with: "Suggestion on fixing"
+
+      click_button "Save request"
+      expect(page).to have_content("Change request successfully created")
+
+      within "#other-validation-requests" do
+        within "tbody tr:nth-child(1)" do
+          within "td:nth-child(1)" do
+            expect(page).to have_content("Reason for invalidation")
+          end
+
+          within "td:nth-child(2)" do
+            expect(page).to have_content("Suggestion on fixing")
+          end
+
+          within "td:nth-child(3)" do
+            expect(page).to have_content("Vlad Idator")
+          end
+
+          within "td:nth-child(4)" do
+            expect(page).to have_content("Not sent yet")
+          end
+        end
+      end
+    end
+
+    context "and a request has been created" do
+      before do
+        create(:other_change_validation_request, :pending, planning_application:, user:, reason: "Reason for invalidation", suggestion: "Suggestion on fixing")
+      end
+
+      it "then the request can be edited" do
+        within ".bops-sidebar" do
+          click_link "Other validation requests"
+        end
+
+        expect(page).to have_current_path("/preapps/#{reference}/check-and-validate/other-validation-issues/other-validation-requests")
+
+        within "#other-validation-requests" do
+          within "tbody tr:nth-child(1)" do
+            within "td:nth-child(1)" do
+              expect(page).to have_content("Reason for invalidation")
+            end
+
+            within "td:nth-child(2)" do
+              expect(page).to have_content("Suggestion on fixing")
+            end
+
+            within "td:nth-child(3)" do
+              expect(page).to have_content("Vlad Idator")
+            end
+
+            within "td:nth-child(4)" do
+              expect(page).to have_content("Not sent yet")
+            end
+          end
+        end
+
+        click_link "Reason for invalidation"
+        expect(page).to have_selector("h1", text: "View other request")
+        expect(page).to have_content("Reason it is invalid: Reason for invalidation")
+        expect(page).to have_content("How it can be made valid: Suggestion on fixing")
+
+        click_link "Edit request"
+        expect(page).to have_selector("h1", text: "Request other validation change")
+
+        fill_in "Tell the applicant another reason why the application is invalid", with: "Other reason for invalidation"
+        fill_in "Explain to the applicant how the application can be made valid", with: "Other suggestion on fixing"
+
+        click_button "Update request"
+        expect(page).to have_selector("h1", text: "Other validation requests")
+        expect(page).to have_content("Change request successfully updated")
+
+        within "#other-validation-requests" do
+          within "tbody tr:nth-child(1)" do
+            within "td:nth-child(1)" do
+              expect(page).to have_content("Other reason for invalidation")
+            end
+
+            within "td:nth-child(2)" do
+              expect(page).to have_content("Other suggestion on fixing")
+            end
+
+            within "td:nth-child(3)" do
+              expect(page).to have_content("Vlad Idator")
+            end
+
+            within "td:nth-child(4)" do
+              expect(page).to have_content("Not sent yet")
+            end
+          end
+        end
+      end
+
+      it "then the request can be deleted" do
+        within ".bops-sidebar" do
+          click_link "Other validation requests"
+        end
+
+        expect(page).to have_current_path("/preapps/#{reference}/check-and-validate/other-validation-issues/other-validation-requests")
+
+        within "#other-validation-requests" do
+          within "tbody tr:nth-child(1)" do
+            within "td:nth-child(1)" do
+              expect(page).to have_content("Reason for invalidation")
+            end
+
+            within "td:nth-child(2)" do
+              expect(page).to have_content("Suggestion on fixing")
+            end
+
+            within "td:nth-child(3)" do
+              expect(page).to have_content("Vlad Idator")
+            end
+
+            within "td:nth-child(4)" do
+              expect(page).to have_content("Not sent yet")
+            end
+          end
+        end
+
+        click_link "Reason for invalidation"
+        expect(page).to have_selector("h1", text: "View other request")
+        expect(page).to have_content("Reason it is invalid: Reason for invalidation")
+        expect(page).to have_content("How it can be made valid: Suggestion on fixing")
+
+        click_button "Delete request"
+        expect(page).to have_selector("h1", text: "Other validation requests")
+        expect(page).to have_content("Change request successfully deleted.")
+        expect(page).to have_content("No other validation requests have been added")
+      end
+    end
+  end
+
+  context "when the application has been invalidated" do
+    let(:planning_application) { create(:planning_application, :invalidated, :pre_application, local_authority:) }
+
+    it "a validation request can be sent" do
+      within ".bops-sidebar" do
+        click_link "Other validation requests"
+      end
+
+      expect(page).to have_current_path("/preapps/#{reference}/check-and-validate/other-validation-issues/other-validation-requests")
+      expect(page).to have_content("No other validation requests have been added")
+
+      click_link "Add other validation request"
+      expect(page).to have_selector("h1", text: "Request other validation change")
+
+      fill_in "Tell the applicant another reason why the application is invalid", with: "Reason for invalidation"
+      fill_in "Explain to the applicant how the application can be made valid", with: "Suggestion on fixing"
+
+      click_button "Send request"
+      expect(page).to have_content("Change request successfully created")
+
+      within "#other-validation-requests" do
+        within "tbody tr:nth-child(1)" do
+          within "td:nth-child(1)" do
+            expect(page).to have_content("Reason for invalidation")
+          end
+
+          within "td:nth-child(2)" do
+            expect(page).to have_content("Suggestion on fixing")
+          end
+
+          within "td:nth-child(3)" do
+            expect(page).to have_content("Vlad Idator")
+          end
+
+          within "td:nth-child(4)" do
+            expect(page).to have_content("Sent")
+          end
+        end
+      end
+    end
+
+    context "and a request has been created" do
+      context "and it has not been responded to" do
+        before do
+          create(:other_change_validation_request, :open, planning_application:, user:, reason: "Reason for invalidation", suggestion: "Suggestion on fixing")
+        end
+
+        it "then the request can't be edited" do
+          within ".bops-sidebar" do
+            click_link "Other validation requests"
+          end
+
+          expect(page).to have_current_path("/preapps/#{reference}/check-and-validate/other-validation-issues/other-validation-requests")
+
+          within "#other-validation-requests" do
+            within "tbody tr:nth-child(1)" do
+              within "td:nth-child(1)" do
+                expect(page).to have_content("Reason for invalidation")
+              end
+
+              within "td:nth-child(2)" do
+                expect(page).to have_content("Suggestion on fixing")
+              end
+
+              within "td:nth-child(3)" do
+                expect(page).to have_content("Vlad Idator")
+              end
+
+              within "td:nth-child(4)" do
+                expect(page).to have_content("Sent")
+              end
+            end
+          end
+
+          click_link "Reason for invalidation"
+          expect(page).to have_selector("h1", text: "View other request")
+          expect(page).to have_content("Reason it is invalid: Reason for invalidation")
+          expect(page).to have_content("How it can be made valid: Suggestion on fixing")
+          expect(page).not_to have_link("Edit request")
+        end
+
+        it "then the request can't be deleted" do
+          within ".bops-sidebar" do
+            click_link "Other validation requests"
+          end
+
+          expect(page).to have_current_path("/preapps/#{reference}/check-and-validate/other-validation-issues/other-validation-requests")
+
+          within "#other-validation-requests" do
+            within "tbody tr:nth-child(1)" do
+              within "td:nth-child(1)" do
+                expect(page).to have_content("Reason for invalidation")
+              end
+
+              within "td:nth-child(2)" do
+                expect(page).to have_content("Suggestion on fixing")
+              end
+
+              within "td:nth-child(3)" do
+                expect(page).to have_content("Vlad Idator")
+              end
+
+              within "td:nth-child(4)" do
+                expect(page).to have_content("Sent")
+              end
+            end
+          end
+
+          click_link "Reason for invalidation"
+          expect(page).to have_selector("h1", text: "View other request")
+          expect(page).to have_content("Reason it is invalid: Reason for invalidation")
+          expect(page).to have_content("How it can be made valid: Suggestion on fixing")
+          expect(page).not_to have_button("Delete request")
+        end
+
+        it "then the request can be cancelled" do
+          within ".bops-sidebar" do
+            click_link "Other validation requests"
+          end
+
+          expect(page).to have_current_path("/preapps/#{reference}/check-and-validate/other-validation-issues/other-validation-requests")
+
+          within "#other-validation-requests" do
+            within "tbody tr:nth-child(1)" do
+              within "td:nth-child(1)" do
+                expect(page).to have_content("Reason for invalidation")
+              end
+
+              within "td:nth-child(2)" do
+                expect(page).to have_content("Suggestion on fixing")
+              end
+
+              within "td:nth-child(3)" do
+                expect(page).to have_content("Vlad Idator")
+              end
+
+              within "td:nth-child(4)" do
+                expect(page).to have_content("Sent")
+              end
+            end
+          end
+
+          click_link "Reason for invalidation"
+          expect(page).to have_selector("h1", text: "View other request")
+          expect(page).to have_content("Reason it is invalid: Reason for invalidation")
+          expect(page).to have_content("How it can be made valid: Suggestion on fixing")
+
+          click_link "Cancel request"
+          expect(page).to have_selector("h1", text: "Cancel validation request")
+
+          click_button "Confirm cancellation"
+          expect(page).to have_content("Cancel reason can't be blank")
+
+          fill_in "Explain to the applicant why this request is being cancelled", with: "Cancellation reasons"
+
+          click_button "Confirm cancellation"
+          expect(page).to have_content("Change request successfully cancelled.")
+          expect(page).to have_selector("h1", text: "Other validation requests")
+
+          within "#other-validation-requests" do
+            within "tbody tr:nth-child(1)" do
+              within "td:nth-child(1)" do
+                expect(page).to have_content("Reason for invalidation")
+              end
+
+              within "td:nth-child(2)" do
+                expect(page).to have_content("Suggestion on fixing")
+              end
+
+              within "td:nth-child(3)" do
+                expect(page).to have_content("Vlad Idator")
+              end
+
+              within "td:nth-child(4)" do
+                expect(page).to have_content("Cancelled")
+              end
+            end
+          end
+        end
+      end
+
+      context "and it has been responded to" do
+        before do
+          create(:other_change_validation_request, :closed, planning_application:, user:, reason: "Reason for invalidation", suggestion: "Suggestion on fixing")
+        end
+
+        it "then the request can't be edited" do
+          within ".bops-sidebar" do
+            click_link "Other validation requests"
+          end
+
+          expect(page).to have_current_path("/preapps/#{reference}/check-and-validate/other-validation-issues/other-validation-requests")
+
+          within "#other-validation-requests" do
+            within "tbody tr:nth-child(1)" do
+              within "td:nth-child(1)" do
+                expect(page).to have_content("Reason for invalidation")
+              end
+
+              within "td:nth-child(2)" do
+                expect(page).to have_content("Suggestion on fixing")
+              end
+
+              within "td:nth-child(3)" do
+                expect(page).to have_content("Vlad Idator")
+              end
+
+              within "td:nth-child(4)" do
+                expect(page).to have_content("Responded")
+              end
+            end
+          end
+
+          click_link "Reason for invalidation"
+          expect(page).to have_selector("h1", text: "Check the response to other request")
+          expect(page).to have_content("Some response")
+          expect(page).not_to have_link("Edit request")
+        end
+
+        it "then the request can't be deleted" do
+          within ".bops-sidebar" do
+            click_link "Other validation requests"
+          end
+
+          expect(page).to have_current_path("/preapps/#{reference}/check-and-validate/other-validation-issues/other-validation-requests")
+
+          within "#other-validation-requests" do
+            within "tbody tr:nth-child(1)" do
+              within "td:nth-child(1)" do
+                expect(page).to have_content("Reason for invalidation")
+              end
+
+              within "td:nth-child(2)" do
+                expect(page).to have_content("Suggestion on fixing")
+              end
+
+              within "td:nth-child(3)" do
+                expect(page).to have_content("Vlad Idator")
+              end
+
+              within "td:nth-child(4)" do
+                expect(page).to have_content("Responded")
+              end
+            end
+          end
+
+          click_link "Reason for invalidation"
+          expect(page).to have_selector("h1", text: "Check the response to other request")
+          expect(page).to have_content("Some response")
+          expect(page).not_to have_button("Delete request")
+        end
+
+        it "then the request can't be canceled" do
+          within ".bops-sidebar" do
+            click_link "Other validation requests"
+          end
+
+          expect(page).to have_current_path("/preapps/#{reference}/check-and-validate/other-validation-issues/other-validation-requests")
+
+          within "#other-validation-requests" do
+            within "tbody tr:nth-child(1)" do
+              within "td:nth-child(1)" do
+                expect(page).to have_content("Reason for invalidation")
+              end
+
+              within "td:nth-child(2)" do
+                expect(page).to have_content("Suggestion on fixing")
+              end
+
+              within "td:nth-child(3)" do
+                expect(page).to have_content("Vlad Idator")
+              end
+
+              within "td:nth-child(4)" do
+                expect(page).to have_content("Responded")
+              end
+            end
+          end
+
+          click_link "Reason for invalidation"
+          expect(page).to have_selector("h1", text: "Check the response to other request")
+          expect(page).to have_content("Some response")
+          expect(page).not_to have_link("Cancel request")
+        end
+      end
+    end
+  end
+
+  context "when the application has been validated" do
+    let(:planning_application) { create(:planning_application, :not_started, :pre_application, local_authority:) }
+
+    context "and there are no requests" do
+      before do
+        planning_application.update!(validated_at: planning_application.valid_from_date)
+        planning_application.start!
+      end
+
+      it "a validation request can't be sent" do
+        within ".bops-sidebar" do
+          click_link "Other validation requests"
+        end
+
+        expect(page).to have_current_path("/preapps/#{reference}/check-and-validate/other-validation-issues/other-validation-requests")
+        expect(page).to have_content("No other validation requests have been added")
+        expect(page).not_to have_link("Add other validation request")
+      end
+    end
+
+    context "and a request has been created" do
+      context "and it has not been responded to" do
+        before do
+          create(:other_change_validation_request, :open, planning_application:, user:, reason: "Reason for invalidation", suggestion: "Suggestion on fixing")
+
+          planning_application.update!(validated_at: planning_application.valid_from_date)
+          planning_application.start!
+        end
+
+        it "then the request can't be edited" do
+          within ".bops-sidebar" do
+            click_link "Other validation requests"
+          end
+
+          expect(page).to have_current_path("/preapps/#{reference}/check-and-validate/other-validation-issues/other-validation-requests")
+
+          within "#other-validation-requests" do
+            within "tbody tr:nth-child(1)" do
+              within "td:nth-child(1)" do
+                expect(page).to have_content("Reason for invalidation")
+              end
+
+              within "td:nth-child(2)" do
+                expect(page).to have_content("Suggestion on fixing")
+              end
+
+              within "td:nth-child(3)" do
+                expect(page).to have_content("Vlad Idator")
+              end
+
+              within "td:nth-child(4)" do
+                expect(page).to have_content("Sent")
+              end
+            end
+          end
+
+          click_link "Reason for invalidation"
+          expect(page).to have_selector("h1", text: "View other request")
+          expect(page).to have_content("Reason it is invalid: Reason for invalidation")
+          expect(page).to have_content("How it can be made valid: Suggestion on fixing")
+          expect(page).not_to have_link("Edit request")
+        end
+
+        it "then the request can't be deleted" do
+          within ".bops-sidebar" do
+            click_link "Other validation requests"
+          end
+
+          expect(page).to have_current_path("/preapps/#{reference}/check-and-validate/other-validation-issues/other-validation-requests")
+
+          within "#other-validation-requests" do
+            within "tbody tr:nth-child(1)" do
+              within "td:nth-child(1)" do
+                expect(page).to have_content("Reason for invalidation")
+              end
+
+              within "td:nth-child(2)" do
+                expect(page).to have_content("Suggestion on fixing")
+              end
+
+              within "td:nth-child(3)" do
+                expect(page).to have_content("Vlad Idator")
+              end
+
+              within "td:nth-child(4)" do
+                expect(page).to have_content("Sent")
+              end
+            end
+          end
+
+          click_link "Reason for invalidation"
+          expect(page).to have_selector("h1", text: "View other request")
+          expect(page).to have_content("Reason it is invalid: Reason for invalidation")
+          expect(page).to have_content("How it can be made valid: Suggestion on fixing")
+          expect(page).not_to have_button("Delete request")
+        end
+
+        it "then the request can be cancelled" do
+          within ".bops-sidebar" do
+            click_link "Other validation requests"
+          end
+
+          expect(page).to have_current_path("/preapps/#{reference}/check-and-validate/other-validation-issues/other-validation-requests")
+
+          within "#other-validation-requests" do
+            within "tbody tr:nth-child(1)" do
+              within "td:nth-child(1)" do
+                expect(page).to have_content("Reason for invalidation")
+              end
+
+              within "td:nth-child(2)" do
+                expect(page).to have_content("Suggestion on fixing")
+              end
+
+              within "td:nth-child(3)" do
+                expect(page).to have_content("Vlad Idator")
+              end
+
+              within "td:nth-child(4)" do
+                expect(page).to have_content("Sent")
+              end
+            end
+          end
+
+          click_link "Reason for invalidation"
+          expect(page).to have_selector("h1", text: "View other request")
+          expect(page).to have_content("Reason it is invalid: Reason for invalidation")
+          expect(page).to have_content("How it can be made valid: Suggestion on fixing")
+
+          click_link "Cancel request"
+          expect(page).to have_selector("h1", text: "Cancel validation request")
+
+          click_button "Confirm cancellation"
+          expect(page).to have_content("Cancel reason can't be blank")
+
+          fill_in "Explain to the applicant why this request is being cancelled", with: "Cancellation reasons"
+
+          click_button "Confirm cancellation"
+          expect(page).to have_content("Change request successfully cancelled.")
+          expect(page).to have_selector("h1", text: "Other validation requests")
+
+          within "#other-validation-requests" do
+            within "tbody tr:nth-child(1)" do
+              within "td:nth-child(1)" do
+                expect(page).to have_content("Reason for invalidation")
+              end
+
+              within "td:nth-child(2)" do
+                expect(page).to have_content("Suggestion on fixing")
+              end
+
+              within "td:nth-child(3)" do
+                expect(page).to have_content("Vlad Idator")
+              end
+
+              within "td:nth-child(4)" do
+                expect(page).to have_content("Cancelled")
+              end
+            end
+          end
+        end
+      end
+
+      context "and it has been responded to" do
+        before do
+          create(:other_change_validation_request, :closed, planning_application:, user:, reason: "Reason for invalidation", suggestion: "Suggestion on fixing")
+
+          planning_application.update!(validated_at: planning_application.valid_from_date)
+          planning_application.start!
+        end
+
+        it "then the request can't be edited" do
+          within ".bops-sidebar" do
+            click_link "Other validation requests"
+          end
+
+          expect(page).to have_current_path("/preapps/#{reference}/check-and-validate/other-validation-issues/other-validation-requests")
+
+          within "#other-validation-requests" do
+            within "tbody tr:nth-child(1)" do
+              within "td:nth-child(1)" do
+                expect(page).to have_content("Reason for invalidation")
+              end
+
+              within "td:nth-child(2)" do
+                expect(page).to have_content("Suggestion on fixing")
+              end
+
+              within "td:nth-child(3)" do
+                expect(page).to have_content("Vlad Idator")
+              end
+
+              within "td:nth-child(4)" do
+                expect(page).to have_content("Responded")
+              end
+            end
+          end
+
+          click_link "Reason for invalidation"
+          expect(page).to have_selector("h1", text: "Check the response to other request")
+          expect(page).to have_content("Some response")
+          expect(page).not_to have_link("Edit request")
+        end
+
+        it "then the request can't be deleted" do
+          within ".bops-sidebar" do
+            click_link "Other validation requests"
+          end
+
+          expect(page).to have_current_path("/preapps/#{reference}/check-and-validate/other-validation-issues/other-validation-requests")
+
+          within "#other-validation-requests" do
+            within "tbody tr:nth-child(1)" do
+              within "td:nth-child(1)" do
+                expect(page).to have_content("Reason for invalidation")
+              end
+
+              within "td:nth-child(2)" do
+                expect(page).to have_content("Suggestion on fixing")
+              end
+
+              within "td:nth-child(3)" do
+                expect(page).to have_content("Vlad Idator")
+              end
+
+              within "td:nth-child(4)" do
+                expect(page).to have_content("Responded")
+              end
+            end
+          end
+
+          click_link "Reason for invalidation"
+          expect(page).to have_selector("h1", text: "Check the response to other request")
+          expect(page).to have_content("Some response")
+          expect(page).not_to have_button("Delete request")
+        end
+
+        it "then the request can't be canceled" do
+          within ".bops-sidebar" do
+            click_link "Other validation requests"
+          end
+
+          expect(page).to have_current_path("/preapps/#{reference}/check-and-validate/other-validation-issues/other-validation-requests")
+
+          within "#other-validation-requests" do
+            within "tbody tr:nth-child(1)" do
+              within "td:nth-child(1)" do
+                expect(page).to have_content("Reason for invalidation")
+              end
+
+              within "td:nth-child(2)" do
+                expect(page).to have_content("Suggestion on fixing")
+              end
+
+              within "td:nth-child(3)" do
+                expect(page).to have_content("Vlad Idator")
+              end
+
+              within "td:nth-child(4)" do
+                expect(page).to have_content("Responded")
+              end
+            end
+          end
+
+          click_link "Reason for invalidation"
+          expect(page).to have_selector("h1", text: "Check the response to other request")
+          expect(page).to have_content("Some response")
+          expect(page).not_to have_link("Cancel request")
+        end
+      end
+    end
+  end
+end