Live updates

Lines reopened after Didcot power failure

All lines have now reopened and trains can run on their normal routes after disruption on First Great Western due to a signalling problem between Didcot Parkway and Swindon.

There are still delays of around 30 minutes to services and buses remain in operation. First Great Western expect normal service to resume from around 1pm.

Rail services diverted to avoid power failure

Services stacking up due to power failure in the Swindon area Credit: Guy Phillips/ITV News Meridian

First Great Western have just told us that buses are in place for travel between Swindon to Didcot, Swindon to Gloucester and Bath to Swindon, should passengers want to use them. There are reduced services running between Cardiff and Bristol to Paddington, with trains diverted via Newbury.

ITV News journalist Guy Phillips has just sent us the latest on his attempt to go to Wales. We "We are now boarding a train back to Reading. Great Western hope to get passengers from Reading to Wales via Bath - the long route."

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First Great Western hit by power failure

First Great Western staff assist passengers at Didcot Parkway Credit: Guy Phillips/ITV News Meridian

Passengers trying to get to Cardiff are now heading from Didcot back to Reading. Those going to Swindon and Bristol are awaiting a fleet of buses to help them reach their destination. Trains from Reading to Wales will go a long route.

Trains cancelled and passengers stranded

Passengers disembark a cancelled train at Didcot Parkway Credit: Guy Phillips/ITV News Meridian

ITV News journalist Guy Phillips is stuck at Didcot Parkway in Oxfordshire. His train has been terminated at Didcot. First Great Western Trains have promised buses to Swindon but Guy has been told many as buses are on the school run. Some passengers are heading back to Reading.

Problems continue on trains in Thames Valley

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Trains to Wales & West still at a standstill

Didcot Parkway is just one of many stations where passengers face long delays this morning Credit: Guy Phillips/ITV News Meridian

The power failure in the Swindon area has brought rush-hour trains between London, the Thames Valley, Wales & the Westcountry to a standstill. ITV News journalist, Guy Phillips, is one of thousands of passengers affected. He's just sent us this update.

The 7.11 from Reading to Swansea has been at a standstill at Didcot Parkway for 40 minutes due to amajor power failure. The guard on the train tells us "There is major signalling problems due an electrical fault. The only information we have is to stay here until it has been resolved."

Power failure delays Thames Valley trains

Train to nowhere ... for now at Didcot Parkway Credit: Guy Phillips/ITV News Meridian

Passengers are still facing long delays on the main route between Reading and Oxford due to a power failure in the Swindon area. ITV News journalist, Guy Phillips, is one of those affected. He's just sent us this update from his train stuck at Didcot.

"We're being told that we will have to wait here 'for a while' due to a big back log of trains. The power cut is affecting signalling." He will send another updates as soon as he's on the move or gets more information.