diff --git a/Gemfile b/Gemfile
index b2d9ef3872..a5793e55d7 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,6 +5,7 @@ ruby "3.2.2"
 
 gem "aasm", "~> 5.5.0"
 gem "active_model_serializers", "~> 0.10.14"
+gem "deep_cloneable", "~> 3.2.0"
 gem "discard", "~> 1.3"
 gem "geckoboard-ruby"
 gem "google-apis-sheets_v4"
diff --git a/Gemfile.lock b/Gemfile.lock
index cb10d7b889..97b4f072d7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -213,6 +213,8 @@ GEM
     date (3.3.3)
     debug_inspector (1.1.0)
     declarative (0.0.20)
+    deep_cloneable (3.2.0)
+      activerecord (>= 3.1.0, < 8)
     descendants_tracker (0.0.4)
       thread_safe (~> 0.3, >= 0.3.1)
     devise (4.9.3)
@@ -735,6 +737,7 @@ DEPENDENCIES
   cucumber
   cucumber-rails (>= 2.4.0)
   database_cleaner
+  deep_cloneable (~> 3.2.0)
   devise
   devise_saml_authenticatable (>= 1.7.0)
   dibber
diff --git a/app/controllers/providers/copy_case_confirmations_controller.rb b/app/controllers/providers/copy_case_confirmations_controller.rb
new file mode 100644
index 0000000000..1c4d5aadb4
--- /dev/null
+++ b/app/controllers/providers/copy_case_confirmations_controller.rb
@@ -0,0 +1,23 @@
+module Providers
+  class CopyCaseConfirmationsController < ProviderBaseController
+    def show
+      @form = CopyCase::ConfirmationForm.new(model: legal_aid_application)
+      @copiable_case = LegalAidApplication.find(session[:copy_case_id])
+    end
+
+    def update
+      @form = CopyCase::ConfirmationForm.new(form_params)
+      @copiable_case = LegalAidApplication.find(session[:copy_case_id])
+
+      render :show unless save_continue_or_draft(@form)
+    end
+
+  private
+
+    def form_params
+      merge_with_model(legal_aid_application) do
+        params.require(:legal_aid_application).permit(:copy_case_id, :copy_case_confirmation)
+      end
+    end
+  end
+end
diff --git a/app/controllers/providers/copy_case_invitations_controller.rb b/app/controllers/providers/copy_case_invitations_controller.rb
new file mode 100644
index 0000000000..87d69cb537
--- /dev/null
+++ b/app/controllers/providers/copy_case_invitations_controller.rb
@@ -0,0 +1,23 @@
+module Providers
+  class CopyCaseInvitationsController < ProviderBaseController
+    def show
+      @form = CopyCase::InvitationForm.new(model: legal_aid_application)
+    end
+
+    def update
+      @form = CopyCase::InvitationForm.new(form_params)
+
+      render :show unless save_continue_or_draft(@form)
+    end
+
+  private
+
+    def form_params
+      merge_with_model(legal_aid_application) do
+        next {} unless params[:legal_aid_application]
+
+        params.require(:legal_aid_application).permit(:copy_case)
+      end
+    end
+  end
+end
diff --git a/app/controllers/providers/copy_case_searches_controller.rb b/app/controllers/providers/copy_case_searches_controller.rb
new file mode 100644
index 0000000000..7ab7096884
--- /dev/null
+++ b/app/controllers/providers/copy_case_searches_controller.rb
@@ -0,0 +1,27 @@
+module Providers
+  class CopyCaseSearchesController < ProviderBaseController
+    def show
+      @form = CopyCase::SearchForm.new(model: legal_aid_application)
+    end
+
+    def update
+      @form = CopyCase::SearchForm.new(form_params)
+
+      render :show unless save_continue_or_draft(@form)
+    end
+
+  private
+
+    def save_continue_or_draft(form, **)
+      draft_selected? ? form.save_as_draft : form.save!
+      return false if form.invalid?
+
+      session[:copy_case_id] = form.copiable_case.id
+      continue_or_draft(**)
+    end
+
+    def form_params
+      params.require(:legal_aid_application).permit(:search_ref)
+    end
+  end
+end
diff --git a/app/forms/copy_case/confirmation_form.rb b/app/forms/copy_case/confirmation_form.rb
new file mode 100644
index 0000000000..2910e0559f
--- /dev/null
+++ b/app/forms/copy_case/confirmation_form.rb
@@ -0,0 +1,30 @@
+module CopyCase
+  class ConfirmationForm < BaseForm
+    form_for LegalAidApplication
+
+    attr_accessor :copy_case_id, :copy_case_confirmation
+
+    validates :copy_case_id, presence: true, unless: proc { draft? }
+    validates :copy_case_confirmation, presence: true, unless: proc { draft? || copy_case_confirmation.present? }
+
+    def save
+      return false unless valid?
+
+      cloner = CopyCase::ClonerService.new(legal_aid_application, legal_aid_application_to_copy)
+      cloner.call
+    end
+    alias_method :save!, :save
+
+    def legal_aid_application_to_copy
+      @legal_aid_application_to_copy ||= LegalAidApplication.find(copy_case_id)
+    end
+
+    def legal_aid_application
+      @legal_aid_application ||= model
+    end
+
+    def exclude_from_model
+      %i[copy_case_id copy_case_confirmation]
+    end
+  end
+end
diff --git a/app/forms/copy_case/invitation_form.rb b/app/forms/copy_case/invitation_form.rb
new file mode 100644
index 0000000000..7ac10479c0
--- /dev/null
+++ b/app/forms/copy_case/invitation_form.rb
@@ -0,0 +1,9 @@
+module CopyCase
+  class InvitationForm < BaseForm
+    form_for LegalAidApplication
+
+    attr_accessor :copy_case
+
+    validates :copy_case, presence: true, unless: proc { draft? || copy_case.present? }
+  end
+end
diff --git a/app/forms/copy_case/search_form.rb b/app/forms/copy_case/search_form.rb
new file mode 100644
index 0000000000..1159520767
--- /dev/null
+++ b/app/forms/copy_case/search_form.rb
@@ -0,0 +1,35 @@
+module CopyCase
+  class SearchForm < BaseForm
+    form_for LegalAidApplication
+
+    APPLICATION_REF_REGEXP = /\AL-[0-9ABCDEFHIJKLMNPRTUVWXY]{3}-[0-9ABCDEFHIJKLMNPRTUVWXY]{3}\z/
+
+    attr_accessor :search_ref, :copiable_case
+
+    # TODO: error message locales
+    validates :search_ref,
+              presence: true,
+              format: { with: APPLICATION_REF_REGEXP },
+              unless: :draft?
+
+    validate :case_exists, unless: :draft?
+
+    def case_exists
+      errors.add(:search_ref, "does not exist") unless case_found?
+    end
+
+    def save
+      return false unless valid?
+
+      true
+    end
+
+    def case_found?
+      @copiable_case = LegalAidApplication.find_by(application_ref: search_ref)
+    end
+
+    def exclude_from_model
+      [:search_ref]
+    end
+  end
+end
diff --git a/app/services/copy_case/cloner_service.rb b/app/services/copy_case/cloner_service.rb
new file mode 100644
index 0000000000..459d7c6972
--- /dev/null
+++ b/app/services/copy_case/cloner_service.rb
@@ -0,0 +1,32 @@
+module CopyCase
+  class ClonerService
+    attr_accessor :copy, :original
+
+    def self.call(copy, original)
+      new(copy, original).call
+    end
+
+    def initialize(copy, original)
+      @copy = copy
+      @original = original
+    end
+
+    def call
+      clone_proceedings
+    end
+
+  private
+
+    def clone_proceedings
+      new_proceedings = original.proceedings.each_with_object([]) do |proceeding, memo|
+        memo << proceeding.deep_clone(
+          except: %i[legal_aid_application_id proceeding_case_id],
+          include: [:scope_limitations],
+        )
+      end
+
+      copy.proceedings = new_proceedings
+      copy.save!
+    end
+  end
+end
diff --git a/app/services/flow/flows/provider_start.rb b/app/services/flow/flows/provider_start.rb
index 88f32108f1..376a5710e4 100644
--- a/app/services/flow/flows/provider_start.rb
+++ b/app/services/flow/flows/provider_start.rb
@@ -28,12 +28,47 @@ class ProviderStart < FlowSteps
         },
         address_selections: {
           path: ->(application) { urls.providers_legal_aid_application_address_selection_path(application) },
-          forward: ->(application) { application.proceedings.any? ? :has_other_proceedings : :proceedings_types },
+          forward: lambda do |application|
+            if Setting.linked_applications?
+              :copy_case_invitations
+            else
+              application.proceedings.any? ? :has_other_proceedings : :proceedings_types
+            end
+          end,
           check_answers: :check_provider_answers,
         },
         addresses: {
           path: ->(application) { urls.providers_legal_aid_application_address_path(application) },
-          forward: ->(application) { application.proceedings.any? ? :has_other_proceedings : :proceedings_types },
+          forward: lambda do |application|
+            if Setting.linked_applications?
+              :copy_case_invitations
+            else
+              application.proceedings.any? ? :has_other_proceedings : :proceedings_types
+            end
+          end,
+          check_answers: :check_provider_answers,
+        },
+        copy_case_invitations: {
+          path: ->(application) { urls.providers_legal_aid_application_copy_case_invitation_path(application) },
+          forward: lambda do |application|
+            if application.copy_case?
+              :copy_case_searches
+            else
+              application.proceedings.any? ? :has_other_proceedings : :proceedings_types
+            end
+          end,
+          check_answers: :check_provider_answers,
+        },
+        copy_case_searches: {
+          path: ->(application) { urls.providers_legal_aid_application_copy_case_search_path(application) },
+          forward: :copy_case_confirmations,
+          check_answers: :check_provider_answers,
+        },
+        copy_case_confirmations: {
+          path: ->(application) { urls.providers_legal_aid_application_copy_case_confirmation_path(application) },
+          forward: lambda do |application|
+            application.proceedings.any? ? :has_other_proceedings : :proceedings_types
+          end,
           check_answers: :check_provider_answers,
         },
         about_financial_means: {
diff --git a/app/views/providers/copy_case_confirmations/show.html.erb b/app/views/providers/copy_case_confirmations/show.html.erb
new file mode 100644
index 0000000000..403f892bef
--- /dev/null
+++ b/app/views/providers/copy_case_confirmations/show.html.erb
@@ -0,0 +1,44 @@
+<%= form_with(model: @form,
+              url: providers_legal_aid_application_copy_case_confirmation_path,
+              method: :patch,
+              local: true) do |form| %>
+  <%= page_template page_title: t(".heading"), template: :basic, form: do %>
+
+    <%= govuk_table do |table|
+          table.with_caption(html_attributes: { class: "govuk-visually-hidden" }, text: t(".table_caption"))
+
+          table.with_head do |head|
+            head.with_row do |row|
+              row.with_cell(text: "LAA Ref.")
+              row.with_cell(text: "Client")
+              row.with_cell(text: "Category")
+              row.with_cell(text: "Firm")
+            end
+          end
+
+          table.with_body do |body|
+            body.with_row do |row|
+              row.with_cell(text: @copiable_case.application_ref)
+              row.with_cell(text: @copiable_case.applicant.full_name)
+              row.with_cell(text: @copiable_case.proceedings.map(&:category_of_law).join(","))
+              row.with_cell(text: @copiable_case.provider.firm.name)
+            end
+          end
+        end %>
+
+    <%= form.hidden_field :copy_case_id, value: @copiable_case.id %>
+
+    <%= form.govuk_collection_radio_buttons(
+          :copy_case_confirmation,
+          yes_no_options,
+          :value,
+          :label,
+          legend: { size: "xl", tag: "h1", text: t(".heading") },
+        ) %>
+
+    <%= next_action_buttons(
+          show_draft: true,
+          form:,
+        ) %>
+  <% end %>
+<% end %>
diff --git a/app/views/providers/copy_case_invitations/show.html.erb b/app/views/providers/copy_case_invitations/show.html.erb
new file mode 100644
index 0000000000..e8f389eda1
--- /dev/null
+++ b/app/views/providers/copy_case_invitations/show.html.erb
@@ -0,0 +1,20 @@
+<%= form_with(model: @form,
+              url: providers_legal_aid_application_copy_case_invitation_path,
+              method: :patch,
+              local: true) do |form| %>
+  <%= page_template page_title: t(".heading"), template: :basic, form: do %>
+
+    <%= form.govuk_collection_radio_buttons(
+          :copy_case,
+          yes_no_options,
+          :value,
+          :label,
+          legend: { size: "xl", tag: "h1", text: t(".heading") },
+        ) %>
+
+    <%= next_action_buttons(
+          show_draft: true,
+          form:,
+        ) %>
+  <% end %>
+<% end %>
diff --git a/app/views/providers/copy_case_searches/show.html.erb b/app/views/providers/copy_case_searches/show.html.erb
new file mode 100644
index 0000000000..b783deeed0
--- /dev/null
+++ b/app/views/providers/copy_case_searches/show.html.erb
@@ -0,0 +1,17 @@
+<%= form_with(model: @form,
+              url: providers_legal_aid_application_copy_case_search_path,
+              method: :patch,
+              local: true) do |form| %>
+    <%= page_template page_title: t(".heading"), template: :basic, form: do %>
+      <%= form.govuk_text_field :search_ref,
+                                label: { text: t(".search_ref.label"), size: "xl", tag: "h1" },
+                                hint: { text: t(".search_ref.hint") },
+                                width: "three-quarters",
+                                value: params["search_ref"] || "" %>
+
+      <%= next_action_buttons(
+            show_draft: true,
+            form:,
+          ) %>
+  <% end %>
+<% end %>
diff --git a/config/locales/en/activemodel.yml b/config/locales/en/activemodel.yml
index 2fabe35db5..b7b860804f 100644
--- a/config/locales/en/activemodel.yml
+++ b/config/locales/en/activemodel.yml
@@ -411,6 +411,8 @@ en:
               blank: Enter details of the incident
         legal_aid_application:
           attributes:
+            copy_case:
+              blank: Select yes if you want to copy an application
             confirm_delegated_functions_date:
               blank: Confirm the date you used delegated functions
             has_dependants:
diff --git a/config/locales/en/providers.yml b/config/locales/en/providers.yml
index 89584fb0a0..f9ac4ff96b 100644
--- a/config/locales/en/providers.yml
+++ b/config/locales/en/providers.yml
@@ -317,6 +317,21 @@ en:
             be prosecuted
             need to pay a financial penalty
             have their legal aid stopped and have to pay back the costs
+
+    copy_case_confirmations:
+      show:
+        heading: Copy this application to your application?
+        table_caption: Application to copy to your application
+    copy_case_invitations:
+      show:
+        heading: Copy an application to your application?
+    copy_case_searches:
+      show:
+        heading: Find the application to copy
+        search_ref:
+          label: Find the application to copy
+          hint: Enter the LAA reference of the case you are searching for
+
     check_passported_answers:
       show:
         h1-heading: Check your answers
diff --git a/config/routes.rb b/config/routes.rb
index a2bdb3038e..8251363ae4 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -160,6 +160,9 @@
         resources :remove_state_benefits, only: %i[show update]
       end
       get :search, on: :collection
+      resource :copy_case_invitation, only: %i[show update]
+      resource :copy_case_search, only: %i[show update]
+      resource :copy_case_confirmation, only: %i[show update]
       resource :delete, controller: :delete, only: %i[show destroy]
       resources :proceedings_types, only: %i[index create]
       resource :has_other_proceedings, only: %i[show update destroy]
diff --git a/db/migrate/20231020085303_add_copy_case_to_legal_aid_application.rb b/db/migrate/20231020085303_add_copy_case_to_legal_aid_application.rb
new file mode 100644
index 0000000000..0f1c297564
--- /dev/null
+++ b/db/migrate/20231020085303_add_copy_case_to_legal_aid_application.rb
@@ -0,0 +1,5 @@
+class AddCopyCaseToLegalAidApplication < ActiveRecord::Migration[7.0]
+  def change
+    add_column :legal_aid_applications, :copy_case, :boolean
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 9e60db7c3a..274c713fcd 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.0].define(version: 2023_10_09_145448) do
+ActiveRecord::Schema[7.0].define(version: 2023_10_20_085303) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "pgcrypto"
   enable_extension "plpgsql"
@@ -602,6 +602,7 @@
     t.decimal "substantive_cost_requested"
     t.string "substantive_cost_reasons"
     t.boolean "applicant_in_receipt_of_housing_benefit"
+    t.boolean "copy_case"
     t.index ["applicant_id"], name: "index_legal_aid_applications_on_applicant_id"
     t.index ["application_ref"], name: "index_legal_aid_applications_on_application_ref", unique: true
     t.index ["discarded_at"], name: "index_legal_aid_applications_on_discarded_at"
diff --git a/spec/services/copy_case/cloner_service_spec.rb b/spec/services/copy_case/cloner_service_spec.rb
new file mode 100644
index 0000000000..256e88e17a
--- /dev/null
+++ b/spec/services/copy_case/cloner_service_spec.rb
@@ -0,0 +1,51 @@
+require "rails_helper"
+
+RSpec.describe CopyCase::ClonerService do
+  subject(:instance) { described_class.new(target, source) }
+
+  describe "#call" do
+    subject(:call) { instance.call }
+
+    let(:target) { create(:legal_aid_application, :with_applicant) }
+    let(:source) { create(:legal_aid_application, :with_proceedings) }
+
+    it "copies proceedings" do
+      expect { call }
+        .to change { target.reload.proceedings.count }
+        .from(0)
+        .to(1)
+
+      source_proceeding = source.proceedings.first
+      copy_of_proceeding = target.proceedings.first
+      expected_attributes = source_proceeding
+                              .attributes
+                              .except("id",
+                                      "legal_aid_application_id",
+                                      "proceeding_case_id",
+                                      "created_at",
+                                      "updated_at")
+
+      expect(copy_of_proceeding)
+        .to have_attributes(**expected_attributes)
+    end
+
+    context "when source has a proceeding with nested scope limitations" do
+      it "copies proceedings scope limitations" do
+        expect { call }
+          .to change { target.reload.proceedings.first&.scope_limitations&.count }
+          .from(nil)
+          .to(2)
+
+        source_scope_limitations = source.proceedings.first.scope_limitations.map do |scl|
+          scl.attributes.except("id", "proceeding_id", "created_at", "updated_at")
+        end
+
+        target_scope_limitations = target.proceedings.first.scope_limitations.map do |scl|
+          scl.attributes.except("id", "proceeding_id", "created_at", "updated_at")
+        end
+
+        expect(target_scope_limitations).to match_array(source_scope_limitations)
+      end
+    end
+  end
+end