Green Motion Car Rental at London Heathrow Airport are based within the Holiday Inn M4J4 on Sipson Road. Once you have arrived at the terminal the best way to proceed to the Hotel is via the Airport Hotel Hoppa Bus Service. This operates from every Terminal from approximately 0430 hours until 2330 hours every day. Clients arriving into Terminals 1, 2 or 3 should take the H1 to the hotel and clients arriving into Terminal 4 and 5 should take the H51. Once you arrive at the hotel the Green Motion office is next to the bus stop on your right, opposite the front door of the hotel. Please note that you will have pay for the Hoppa Bus Service.