diff --git a/app/domains.yml b/app/domains.yml
index 4df2957c0..ea5be6446 100644
--- a/app/domains.yml
+++ b/app/domains.yml
@@ -2251,6 +2251,10 @@ highworthtowncouncil.gov.uk:
   owner: Highworth Town Council
   crown: false
   agreement_signed: false
+hillingdon.gov.uk:
+  owner: London Borough of Hillingdon
+  crown: false
+  agreement_signed: true
 hinckley-bosworth.gov.uk:
   owner: Hinckley & Bosworth Borough Council
   crown: false