diff --git a/app/controllers/admin/citations_controller.rb b/app/controllers/admin/citations_controller.rb
index 51a42fa130..19ced491f2 100644
--- a/app/controllers/admin/citations_controller.rb
+++ b/app/controllers/admin/citations_controller.rb
@@ -1,7 +1,17 @@
 class Admin::CitationsController < AdminController
   def index
+    @query = params[:query]
+
+    citations = (
+      if @query
+        Citation.search(@query)
+      else
+        Citation
+      end
+    )
+
     @citations =
-      Citation.
+      citations.
       order(created_at: :desc).
       paginate(page: params[:page], per_page: 50)
   end
diff --git a/app/models/citation.rb b/app/models/citation.rb
index 460eb357ef..b5d0313b8c 100644
--- a/app/models/citation.rb
+++ b/app/models/citation.rb
@@ -46,6 +46,12 @@ class Citation < ApplicationRecord
       or(where(citable: info_request_batch.info_requests))
   end
 
+  def self.search(query)
+    where(<<~SQL, query: query)
+      lower(citations.source_url) LIKE lower('%'||:query||'%')
+    SQL
+  end
+
   def applies_to_batch_request?
     citable.is_a?(InfoRequestBatch)
   end
diff --git a/app/views/admin/citations/index.html.erb b/app/views/admin/citations/index.html.erb
index 4992d55dd1..86ae2f7dde 100644
--- a/app/views/admin/citations/index.html.erb
+++ b/app/views/admin/citations/index.html.erb
@@ -14,6 +14,17 @@
   </div>
 </div>
 
+
+<%= form_tag({}, method: :get, class: 'form form-search') do %>
+  <div class="input-append">
+    <%= text_field_tag 'query', params[:query], size: 30, class: 'input-large search-query' %>
+    <%= submit_tag 'Search', class: 'btn' %>
+  </div>
+
+  <span class="help-inline">(substring search, source_url)</span>
+<% end %>
+
+
 <%= render partial: 'admin/citations/list',
            locals: { citations: @citations } %>
 
diff --git a/doc/CHANGES.md b/doc/CHANGES.md
index 116e1ab02d..638385fbb2 100644
--- a/doc/CHANGES.md
+++ b/doc/CHANGES.md
@@ -2,6 +2,7 @@
 
 ## Highlighted Features
 
+* Add basic Citation searching in admin UI (Gareth Rees)
 * Fix script/mailin when multiple EXCEPTION_NOTIFICATIONS_TO addresses are
   specified (Graeme Porteous)
 * Add example logrotate configuration (Graeme Porteous)
diff --git a/spec/controllers/admin/citations_controller_spec.rb b/spec/controllers/admin/citations_controller_spec.rb
index b9a34d43a0..7f04d204a3 100644
--- a/spec/controllers/admin/citations_controller_spec.rb
+++ b/spec/controllers/admin/citations_controller_spec.rb
@@ -15,6 +15,19 @@
       expect(assigns[:citations]).to all(be_a(Citation))
     end
 
+    it 'assigns the query' do
+      get :index, params: { query: 'hello' }
+      expect(assigns[:query]).to eq('hello')
+    end
+
+    it 'filters citations by the search query' do
+      net = FactoryBot.create(:citation, source_url: 'https://example.net/a')
+      org = FactoryBot.create(:citation, source_url: 'https://example.org/b')
+      get :index, params: { query: 'example.net' }
+      expect(assigns[:citations]).to include(net)
+      expect(assigns[:citations]).not_to include(org)
+    end
+
     it 'renders the correct template' do
       expect(response).to render_template(:index)
     end
diff --git a/spec/models/citation_spec.rb b/spec/models/citation_spec.rb
index 46d940ac03..25a60f4819 100644
--- a/spec/models/citation_spec.rb
+++ b/spec/models/citation_spec.rb
@@ -130,6 +130,23 @@ def setup_for_x_scope_data
     end
   end
 
+  describe '.search' do
+    subject { described_class.search(query) }
+
+    let!(:net) do
+      FactoryBot.create(:citation, source_url: 'https://example.net/story')
+    end
+
+    let!(:org) do
+      FactoryBot.create(:citation, source_url: 'https://example.org/story')
+    end
+
+    let(:query) { 'example.net' }
+
+    it { is_expected.to include(net) }
+    it { is_expected.not_to include(org) }
+  end
+
   subject(:citation) { FactoryBot.build(:citation) }
 
   describe 'associations' do