Workers on the Heathrow Express have started a 48-hour strike, meaning reduced services and no overnight trains.
Half-hourly trains will run between 8am and 8pm today and Saturday between Paddington and Heathrow Airport Terminal 5 via Heathrow Central Terminals 1 and 3.
Another strike will take place on June 24.
Members of the Rail Maritime and Transport union walked out at 03.40 this morning in a dispute over pay. RMT officials say the 4.5% increase over one year was not acceptable.
Heathrow Connect services, which also operate from London Paddington, will not run on Friday and Saturday.
by Dinah Hatch
