How to find Customs at London Heathrow Airport T3
When you enter or leave the UK with an ATA Carnet, you must have your Carnet processed by UK Border Force Customs.
UK Border Force at London Heathrow Terminal 3 is situated behind the check in desks on the ground floor between Zones C and D
If the desk is closed, pick up the red telephone to contact a customs officer and follow their instructions.
Or call 020 8745 6900
Hours of operation