Delays at London Paddington train station have now been cleared, following two days of disruption.
Services to Heathrow Airport were suspended and other services were cancelled on Thursday after two fires caused signalling problems.
Trains are now running normally to and from the station.
It was supposed to be the start of their great Christmas Getaway.
But travel plans for thousands of people have been wrecked by rail failures.
Signal problems hit services into and out of Paddington Station and near Gatwick Airport.
Meanwhile, the AA has reported a surge in breakdowns in the capital - many of them flat batteries - as people leave their lights on when they dash to go shopping.
Here's Ronke Phillips.
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.
– Network Rail spokespersonWe 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.
Service suspended on Heathrow Connect between London Paddington and Hayes and Harlington due to signalling problem at Hayes and Harlington.
The Crossrail scheme has hit a stumbling block, after a hopper fell over when it was loading mud from the new tunnels onto freight trains.
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A new athletics track at Paddington Recreation Ground is to be opened today, the site where Roger Bannister trained to break the four-minute mile. The project, which aims to leave a lasting legacy for the Olympic Games, is backed by double gold medalist Mo Farah.
Sir Roger Bannister trained at the former track in Paddington before travelling to Oxford to break the record in 1954.
Farah said that getting a new running track in Central London was great news for athletes of the future.
£130,000 for the project has come from the Marathon Trust and another £44,000 from The London Mayors Legacy Fund with the remaining funding being met by Westminster City Council.
Cllr Steve Summers, deputy cabinet member for Olympics, sport and leisure, said they hope that hundreds of people will be inspired to take up track and field sports and maybe even go on to represent the UK in Olympics around the world.
Disruption on First Great Western between Paddington and Bristol Temple Meads, between Paddington and Oxford and between Paddington and Taunton due to person hit by train at Hayes and Harlington. Tickets being accepted on South West Trains and Chiltern Railway services.
