Trains depart Paddington every 15 minutes from 05:10 (06:10 on Sunday) 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 2 and 3 (journey time from Paddington 15 minutes); and Heathrow Terminal 5 (journey time 21 minutes), platforms 3 and 4. Until the opening of Terminal 5 on 27 March 2008, Heathrow Express terminated at Heathrow Terminal 4. In 2010, Heathrow Express introduced a dedicated shuttle between Heathrow Central and Terminal 4 that would be timed to connect with the main Heathrow Express service to/from Terminal 5 to improve connections between the terminals.