Arriving at London airports. Just follow these simple steps for a trouble free arrival. Follow the ARRIVALS sign if you are ending your journey in London or transferring to a UK domestic flight. This will take you to the Immigration Hall where you must present your passport and any necessary visa/health documentation. At HEATHROW airport proceed downstairs to claim your baggage from the carousel indicating your flight number. At GATEWICK airport proceed downstairs in the North Terminal to claim your baggage from the carousel indicating your flight number. Free trolleys are available for your bags. To clear customs take the Red Channel if you have goods to declare or the Green Channel if you have no goods to declare. You will then be in the Arrivals Hall. From here you can obtain transport into central London; transfer between GATEWICK and HEATHROW airports and transfer to UK domestic flights.