OXFORDSHIRE-bound trains from London Paddington are facing major delays tonight after a signalling problem near Acton.
First Great Western services are being delayed by up to 20 minutes and cancelled out of the capital at short notice.
Meanwhile, the A4095 in Bicester was closed between Skimmingdish Lane and Banbury Road roundabout following a crash involving a motorbike and three other vehicles.
Insp Chris Evans, of Thames Valley Police, said the male motorcyclist, in his 30s, escaped injury and did not need hospital treatment.
He added that no one else was injured and the road has been reopened.
Updates on the road closure in Bicester will be posted automatically on our Live Traffic Service.