diff --git a/app/models/case_log.rb b/app/models/case_log.rb
index bda9ec590..b9bbdc2ad 100644
--- a/app/models/case_log.rb
+++ b/app/models/case_log.rb
@@ -388,6 +388,7 @@ private
     begin
       Timeout.timeout(5) { postcode_lookup = PIO.lookup(postcode) }
     rescue Timeout::Error
+      Rails.logger.warn("Postcodes.io lookup timed out")
     end
     if postcode_lookup && postcode_lookup.info.present?
       postcode_lookup.codes["admin_district"]
diff --git a/spec/models/case_log_spec.rb b/spec/models/case_log_spec.rb
index 6d731d42a..3b9d2e4a2 100644
--- a/spec/models/case_log_spec.rb
+++ b/spec/models/case_log_spec.rb
@@ -412,6 +412,17 @@ RSpec.describe CaseLog do
           .to raise_error(ActiveRecord::RecordInvalid, /#{I18n.t("validations.postcode")}/)
       end
 
+      context "when the local authority lookup times out" do
+        before do
+          allow(Timeout).to receive(:timeout).and_raise(Timeout::Error)
+        end
+
+        it "logs a warning" do
+          expect(Rails.logger).to receive(:warn).with("Postcodes.io lookup timed out")
+          address_case_log.update!({ postcode_known: 1, property_postcode: "M1 1AD" })
+        end
+      end
+
       it "correctly resets all fields if property postcode not known" do
         address_case_log.update!({ postcode_known: 0 })