Rail passengers travelling between the West Country and London Paddington have faced long delays after signalling equipment was damaged near Slough.
Three quarters of the trains running between Plymouth and Paddington were cancelled today.
Trains leaving Plymouth for London have been badly affected by the disruption, which has seen the usual 20 to 25 trains running on the line per hour be reduced to just four per hour.
There's major disruption on First Great Western services between Exeter Central and Exmouth due to signalling problem. All lines are blocked, with delays and cancellations as a result. First Great Western say they have no estimate for when a normal service will resume.
Cleaners on First Great Western trains are on strike for a fourth time today.
Members of the RMT Union are calling for the action in a row over pay and the use zero hour contracts by sub-contractor Mitie. The cleaners first went on strike in October.
The rail union the RMT has claimed today that the government's First Great Western deal will cost taxpayers almost £250 million.
The union says the extension for the West Coast mainline will only have around £30 million paid in premiums.
Premiums on the last 2 years of the previous contract came to £279 million, meaning the public could miss out on a quarter of a billion under the current deal.
FirstGroup's First Great Western train company will keep the franchise to operate trains from London to the South West for another two years.
The Department for Transport said it would last until September 2015.
Under the agreement, passengers will expect to see improvements to services including greater seating and sleeper carriage capacity and an improved wi-fi coverage.
It's expected that train passengers in the region will hear tomorrow that First Great Western's contract has been extended for a further two years.
The Government has been forced to extend it after the last round of franchise negotiations collapsed in chaos.
But there are worries that services may be reduced, and there'll be further delays to much needed investment.
John Andrews reports:
First Great Western has apologised after hundreds of passengers travelling from the West Country to Paddington were stranded for hours on a train. An inquiry's started into why it took so long to repair the fault near Pewsey.
There were 500 people on board. Today some complained they were left without food or water. Bob Constantine reports.
Passenger Nicole Withers was returning to London after a holiday in Devon when she became stranded on a Penzance to London Paddington train for almost six hours on Sunday.
There is flooding on the line at Eggesford.
This means trains cannot run between Exeter St Davids and Barnstaple.
Buses have been requested