An emergency services incident that caused disruption to trains towards Gatwick Airport has been cleared and services have returned to normal.
But passengers attempting to get to London’s major airport by Great Western Rail services face disruption, after a track fault near Southall also hit trains heading to Heathrow.
The Heathrow Express between Heathrow Terminal 5 and London Paddington is also disrupted, as are Elizabeth Line services.
Several Tube lines also fave severe and minor delays and part closures.