Services to and from Paddington are currently being severely disrupted following two separate signalling problems at Acton and Hayes in west London.
Engineers have been on site since the incidents occurred and have worked through the night to repair extensive damage to lineside equipment, some of which has been damaged by fire.
Until the repairs are complete, two of the four lines serving Paddington will remain closed with an amended timetable in place to many destinations.
We would like to offer our sincere apologies to anyone who has had their travel plans disrupted as a result of these problems, particularly at this very busy time of year.
We have diverted all available resources to fixing the problems and will do everything we can to get a full service running as quickly as possible.
Passengers are advised to check with their train operator or National Rail Enquiries for further details.
More top news
The head of an international drug gang, which hid cocaine in children's presents, has been jailed for 15 years.
It's being called London's first modern contemporary art walk. And it begins today.
Police are attempting to find a vulnerable missing 16-year-old girl who is feared to be with a 51-year-old man.