diff --git a/app/controllers/case_workers/claims_controller.rb b/app/controllers/case_workers/claims_controller.rb
index 484ad4b673..6061416712 100644
--- a/app/controllers/case_workers/claims_controller.rb
+++ b/app/controllers/case_workers/claims_controller.rb
@@ -10,7 +10,8 @@ class ClaimsController < CaseWorkers::ApplicationController
     respond_to :html
 
     # callback order is important (must set claims before filtering and sorting)
-    before_action :set_claims,              only: %i[index archived]
+    before_action :set_claims, only: %i[index archived]
+    before_action :set_presenters
     before_action :filter_current_claims,   only: [:index]
     before_action :filter_archived_claims,  only: [:archived]
     before_action :sort_claims,             only: %i[index archived]
@@ -84,6 +85,10 @@ def set_claims
       @claims = Claims::CaseWorkerClaims.new(current_user:, action: tab, criteria: criteria_params).claims
     end
 
+    def set_presenters
+      @defendant_presenter = CaseWorkers::DefendantPresenter
+    end
+
     # Only these 2 actions are handle in this controller. Rest of actions in the admin-namespaced controller.
     def tab
       %w[current archived].include?(params[:tab]) ? params[:tab] : 'current'
diff --git a/app/controllers/external_users/claims_controller.rb b/app/controllers/external_users/claims_controller.rb
index 1235bdb993..e9cb879e0d 100644
--- a/app/controllers/external_users/claims_controller.rb
+++ b/app/controllers/external_users/claims_controller.rb
@@ -14,6 +14,7 @@ class ResourceClassNotDefined < StandardError; end
 
     prepend_before_action :clean_multiparameter_dates, only: %i[create update]
     before_action :set_user_and_provider
+    before_action :set_presenters
     before_action :set_claims_context, only: %i[index archived outstanding authorised]
     before_action :set_financial_summary, only: %i[index outstanding authorised]
 
@@ -212,6 +213,10 @@ def set_user_and_provider
       @provider = @external_user.provider
     end
 
+    def set_presenters
+      @defendant_presenter = ExternalUsers::DefendantPresenter
+    end
+
     def set_claims_context
       context = Claims::ContextMapper.new(@external_user, scheme:)
       @claims_context = context.available_claims
diff --git a/app/presenters/case_workers/defendant_presenter.rb b/app/presenters/case_workers/defendant_presenter.rb
new file mode 100644
index 0000000000..94bbf5a47e
--- /dev/null
+++ b/app/presenters/case_workers/defendant_presenter.rb
@@ -0,0 +1,9 @@
+module CaseWorkers
+  class DefendantPresenter < BasePresenter
+    presents :defendant
+
+    def representation_orders
+      defendant.representation_orders.map { |rep_order| RepresentationOrder.new(rep_order, @view) }
+    end
+  end
+end
diff --git a/app/presenters/case_workers/representation_order.rb b/app/presenters/case_workers/representation_order.rb
new file mode 100644
index 0000000000..98a1d769e5
--- /dev/null
+++ b/app/presenters/case_workers/representation_order.rb
@@ -0,0 +1,6 @@
+module CaseWorkers
+  class RepresentationOrder < BasePresenter
+    presents :representation_order
+    def maat_details = @maat_details ||= MaatService.call(maat_reference:)
+  end
+end
diff --git a/app/presenters/external_users/defendant_presenter.rb b/app/presenters/external_users/defendant_presenter.rb
new file mode 100644
index 0000000000..0a2b561f40
--- /dev/null
+++ b/app/presenters/external_users/defendant_presenter.rb
@@ -0,0 +1,9 @@
+module ExternalUsers
+  class DefendantPresenter < BasePresenter
+    presents :defendant
+
+    def representation_orders
+      defendant.representation_orders.map { |rep_order| RepresentationOrder.new(rep_order, @view) }
+    end
+  end
+end
diff --git a/app/presenters/external_users/representation_order.rb b/app/presenters/external_users/representation_order.rb
new file mode 100644
index 0000000000..b34c19d19f
--- /dev/null
+++ b/app/presenters/external_users/representation_order.rb
@@ -0,0 +1,9 @@
+module ExternalUsers
+  class RepresentationOrder < BasePresenter
+    presents :representation_order
+
+    def maat_details
+      { case_number: '???' }
+    end
+  end
+end
diff --git a/app/services/maat_service.rb b/app/services/maat_service.rb
new file mode 100644
index 0000000000..8ac57929a5
--- /dev/null
+++ b/app/services/maat_service.rb
@@ -0,0 +1,17 @@
+class MaatService
+  def self.call(...) = new(...).call
+
+  def initialize(**kwargs)
+    @connection = MaatService::Connection.instance
+    @maat_reference = kwargs[:maat_reference]
+  end
+
+  def call
+    data = @connection.fetch(@maat_reference)
+
+    {
+      case_number: data['caseId'],
+      representation_order_date: data['crownRepOrderDate']
+    }
+  end
+end
diff --git a/app/services/maat_service/connection.rb b/app/services/maat_service/connection.rb
new file mode 100644
index 0000000000..be84ccd3b3
--- /dev/null
+++ b/app/services/maat_service/connection.rb
@@ -0,0 +1,37 @@
+class MaatService
+  class Connection
+    include Singleton
+
+    def fetch(maat_reference)
+      JSON.parse(client.get("assessment/rep-orders/#{maat_reference}").body)
+    rescue Faraday::ConnectionFailed
+      {}
+    end
+
+    private
+
+    def client
+      @client ||= Faraday.new(Settings.maat_api_url, request: { timeout: 2 }) do |conn|
+        conn.headers['Authorization'] = "Bearer #{oauth_token}"
+      end
+    end
+
+    def oauth_token
+      response = Faraday.post(Settings.maat_api_oauth_url, request_params, request_headers)
+      JSON.parse(response.body)['access_token']
+    end
+
+    def request_params
+      {
+        client_id: Settings.maat_api_oauth_client_id,
+        client_secret: Settings.maat_api_oauth_client_secret,
+        scope: Settings.maat_api_oauth_scope,
+        grant_type: 'client_credentials'
+      }
+    end
+
+    def request_headers
+      { content_type: 'application/x-www-form-urlencoded' }
+    end
+  end
+end
diff --git a/app/views/shared/_claim_defendants.html.haml b/app/views/shared/_claim_defendants.html.haml
index 820c36556a..7d89a46759 100644
--- a/app/views/shared/_claim_defendants.html.haml
+++ b/app/views/shared/_claim_defendants.html.haml
@@ -1,3 +1,3 @@
 - defendants.each_with_index do | defendant, index |
   .govuk-grid-column-one-half
-    = render partial: 'shared/claim_defendant_details', locals: { defendant: defendant, index: index += 1 }
+    = render partial: 'shared/claim_defendant_details', locals: { defendant: present(defendant, CaseWorkers::DefendantPresenter), index: index += 1 }
diff --git a/app/views/shared/_representation_order_details.html.haml b/app/views/shared/_representation_order_details.html.haml
new file mode 100644
index 0000000000..fabb26eb16
--- /dev/null
+++ b/app/views/shared/_representation_order_details.html.haml
@@ -0,0 +1,11 @@
+= govuk_table do |table|
+  - table.with_caption(size: 's', text: 'Details from MAAT (beta)')
+
+  - table.with_body do |body|
+    - body.with_row do |row|
+      - row.with_cell(header: true, text: 'Case number')
+      - row.with_cell(text: representation_order.maat_details[:case_number])
+
+    - body.with_row do |row|
+      - row.with_cell(header: true, text: 'Date')
+      - row.with_cell(text: representation_order.maat_details[:representation_order_date])
diff --git a/config/settings.yml b/config/settings.yml
index 9e619fefc1..1d70990202 100644
--- a/config/settings.yml
+++ b/config/settings.yml
@@ -230,3 +230,9 @@ notify_report_errors: <%= ENV["ENV"].in?(%w[api-sandbox production]) %>
 postcode_regexp: !ruby/regexp '/\A([Gg][Ii][Rr] 0[Aa]{2})|((([A-Za-z][0-9]{1,2})|(([A-Za-z][A-Ha-hJ-Yj-y][0-9]{1,2})|(([A-Za-z][0-9][A-Za-z])|([A-Za-z][A-Ha-hJ-Yj-y][0-9]?[A-Za-z])))) [0-9][A-Za-z]{2})\z/'
 
 maat_regexp: !ruby/regexp <%= ENV['MAAT_REGEXP'] || '/^[2-9][0-9]{6}$/' %>
+
+maat_api_url: <%= ENV['MAAT_API_URL'] %>
+maat_api_oauth_client_id: <%= ENV['OAUTH_CLIENT_ID'] %>
+maat_api_oauth_client_secret: <%= ENV['OAUTH_CLIENT_SECRET'] %>
+maat_api_oauth_scope: <%=ENV['OAUTH_SCOPE'] %>
+maat_api_oauth_url: <%=ENV['OAUTH_URL']%>
diff --git a/spec/presenters/case_workers/defendant_presenter_spec.rb b/spec/presenters/case_workers/defendant_presenter_spec.rb
new file mode 100644
index 0000000000..60bf1d343d
--- /dev/null
+++ b/spec/presenters/case_workers/defendant_presenter_spec.rb
@@ -0,0 +1,20 @@
+RSpec.describe CaseWorkers::DefendantPresenter do
+  subject(:defendant_presenter) { described_class.new(defendant, view) }
+
+  describe '#representation_orders' do
+    subject(:representation_orders) { defendant_presenter.representation_orders }
+
+    context 'when there are representation orders' do
+      let(:defendant) { build(:defendant, representation_orders: build_list(:representation_order, 3)) }
+
+      it { expect(representation_orders.length).to eq 3 }
+      it { is_expected.to all(be_a(CaseWorkers::RepresentationOrder)) }
+    end
+
+    context 'when there are no representation orders' do
+      let(:defendant) { build(:defendant, representation_orders: []) }
+
+      it { is_expected.to be_empty }
+    end
+  end
+end
diff --git a/spec/presenters/external_users/defendant_presenter_spec.rb b/spec/presenters/external_users/defendant_presenter_spec.rb
new file mode 100644
index 0000000000..67f43669d6
--- /dev/null
+++ b/spec/presenters/external_users/defendant_presenter_spec.rb
@@ -0,0 +1,20 @@
+RSpec.describe ExternalUsers::DefendantPresenter do
+  subject(:defendant_presenter) { described_class.new(defendant, view) }
+
+  describe '#representation_orders' do
+    subject(:representation_orders) { defendant_presenter.representation_orders }
+
+    context 'when there are representation orders' do
+      let(:defendant) { build(:defendant, representation_orders: build_list(:representation_order, 3)) }
+
+      it { expect(representation_orders.length).to eq 3 }
+      it { is_expected.to all(be_a(ExternalUsers::RepresentationOrder)) }
+    end
+
+    context 'when there are no representation orders' do
+      let(:defendant) { build(:defendant, representation_orders: []) }
+
+      it { is_expected.to be_empty }
+    end
+  end
+end
diff --git a/spec/services/maat_service_spec.rb b/spec/services/maat_service_spec.rb
new file mode 100644
index 0000000000..6b89974ffa
--- /dev/null
+++ b/spec/services/maat_service_spec.rb
@@ -0,0 +1,61 @@
+RSpec.describe MaatService do
+  before do
+    allow(Settings).to receive_messages(maat_api_url: 'https://example.com', maat_api_oauth_url: 'https://example.com/oauth')
+    stub_request(:post, 'https://example.com/oauth')
+      .to_return(body: { access_token: 'test_token' }.to_json)
+  end
+
+  describe '.call' do
+    subject { described_class.call(maat_reference:) }
+
+    let(:maat_reference) { '9876543' }
+    let(:connection) { MaatService::Connection.instance }
+
+    context 'with a valid MAAT reference' do
+      before do
+        stub_request(:get, "https://example.com/assessment/rep-orders/#{maat_reference}")
+          .to_return(body: { caseId: 'TEST12345678', crownRepOrderDate: '2024-03-28' }.to_json)
+      end
+
+      it { is_expected.to eq({ case_number: 'TEST12345678', representation_order_date: '2024-03-28' }) }
+    end
+
+    context 'with a valid MAAT reference with no date' do
+      before do
+        stub_request(:get, "https://example.com/assessment/rep-orders/#{maat_reference}")
+          .to_return(body: { caseId: 'TEST12345678' }.to_json)
+      end
+
+      it { is_expected.to eq({ case_number: 'TEST12345678', representation_order_date: nil }) }
+    end
+
+    context 'with an unknown MAAT reference' do
+      before do
+        stub_request(:get, "https://example.com/assessment/rep-orders/#{maat_reference}")
+          .to_return(status: 404, body: { message: "No Rep Order found for ID: #{maat_reference}" }.to_json)
+      end
+
+      it { is_expected.to eq({ case_number: nil, representation_order_date: nil }) }
+    end
+
+    context 'when unauthorized' do
+      before do
+        stub_request(:get, "https://example.com/assessment/rep-orders/#{maat_reference}")
+          .to_return(status: 401, body: { message: 'Unauthorized' }.to_json)
+      end
+
+      it { is_expected.to eq({ case_number: nil, representation_order_date: nil }) }
+    end
+
+    context 'when the OAuth settings are not correct' do
+      before do
+        stub_request(:post, 'https://example.com/oauth')
+          .to_return(status: 400, body: { error: 'invalid_client' }.to_json)
+        stub_request(:get, "https://example.com/assessment/rep-orders/#{maat_reference}")
+          .to_return(status: 401, body: { message: 'Unauthorized' }.to_json)
+      end
+
+      it { is_expected.to eq({ case_number: nil, representation_order_date: nil }) }
+    end
+  end
+end