Heathrow Express is an airport rail link between London Heathrow Airport and Paddington. It opened in 1998 and is operated by the Heathrow Express Operating Company, a wholly owned subsidiary of Heathrow Airport Holdings. It is an open access operator and not subject to franchising.
Trains depart Paddington every 15 minutes from 05.10 until 23.25, and there is a similar quarter-hourly service in the return direction.
At Paddington they use dedicated platforms 6 and 7, although on occasions other platforms are used. There are two stops at Heathrow: Heathrow Central, serving Terminals 1, 2 and 3 (journey time from Paddington 15 minutes); and Heathrow Terminal 5 (journey time 21 minutes). Until the opening of Terminal 5 on 27 March 2008, Heathrow Express terminated at Heathrow Terminal 4, this is now served by the 'Heathrow Express shuttle' from Heathrow Central.