A woman who is believed to have killed herself after starting a fire while inside a train toilet has been named as a 43 year old from London.
Rachel James, from Uxbridge, died in the fire on the train travelling from Northampton to London on 11 April.
The fire started at about 1705 BST and the train stopped at Leighton Buzzard, Bedfordshire, where all the passengers were taken off. No-one else was hurt.
Police said the incident was not being treated as an accident.
Another passenger alerted the conductor to the fire on the service, which had left Northampton at 1625 BST.
A spokeswoman for British Transport Police said: "The deceased woman has injuries consistent with burns.
"No other person is believed to have been involved in the incident."
Overhead power lines on the busy West Coast main line were switched off as a precaution as police, firefighters and the ambulance service attended the scene.
No trains were able to enter or leave Euston station until 1900 BST when services resumed but with delays.
London Midland initially put on bus services to replace trains.
West Coast operator Virgin Trains also had its rush-hour services badly disrupted.