Rail passengers in Berkshire had a commute of a nightmare on Wednesday after a high-speed test train ripped through overhead electric cables overnight.
Travellers were left stranded at Reading Station, with trains unable to run to and from London Paddington.
Trains on the Heathrow Express were also affected, with passengers forced to cram onto trains into London Waterloo instead.
Network Rail has apologised for the disruption.
Here's the latest from our reporters Emma Wilkinson and Mel Bloor.