Add "Add location" button

app/views/locations/index.html.erb

@@ -52,5 +52,6 @@
     <% end %>
   <% end %>
 <% end %>
+<%= govuk_button_link_to "Add a location", new_location_path(id: @scheme.id), secondary: true %>
 
 <%== render partial: "pagy/nav", locals: { pagy: @pagy, item_name: "locations" } %>

spec/features/schemes_spec.rb

@@ -243,6 +243,16 @@ RSpec.describe "Schemes scheme Features" do
               end
             end
 
+            context "when the user clicks add location" do
+              before do
+                click_link("Locations")
+                click_link("Add a location")
+              end
+
+              it "shows the new location form" do
+                expect(page).to have_content("Add a location to this scheme")
+              end
+            end
           end
         end
       end