Euston was shut during rush hour yesterday evening as firefighters battled lineside blaze / Getty

Travellers delayed by half-an-hour or more can claim compensation

As Euston station in central London reopens, the main line between the capital and Bristol has closed  — with disruption now expected for the rest of the day. 

Most services are now running in and out of London Euston, following the lineside fire yesterday afternoon that stopped all rush-hour trains. London Overground services are still unable to run on the line, with services to Harrow & Wealdstone suspended until around 1pm.

Virgin Trains is planning a full service, but warned that services “may be busier than usual and could be subject to delays”. 

Passengers who failed to travel on Wednesday will be able to use their tickets for travel today, or get a full refund.

London Midland has made the same pledge, and warned: “Some trains may be shorter than normal as many carriages were trapped in sidings overnight while Network Rail carried out repairs.”

No trains were able to run in or out of Euston due to a lineside fire near South Hampstead that damaged signalling equipment.

Passengers who were delayed by 30 minutes or more — which means almost all of the 70,000 passengers affected — are able to claim compensation.

Travellers between Bristol and London have been hit by overrunning engineering work at Bath Spa. Initially it was predicted that normal service would be resumed at 9am. Trains are now running, but services will be affected for the rest of the day.

GWR, the main train operator, said: "As a result of ongoing engineering work in the Bath Spa area fewer trains are able to operate through the station. 

"The hourly train service between London Paddington, Reading, Swindon, Chippenham, Bath Spa and Bristol Temple Meads will continue to operate through Bath Spa station in both directions, albeit with some delay."

Trains to and from London Waterloo are terminating at Salisbury.