Travel chaos with four major train networks hit by ‘nationwide fault’

Major train companies are suffering from delays amid a ‘nationwide fault’ affecting National Rail.

Gatwick Express, Great Northern, Southern, Thameslink, Southeastern, South Western Railway and Scotrail trains have all been hit by delays, cancellations and tweaked timetables. Routes to Heathrow Airport via the Elizabeth line have also been impacted.

To blame is an issue with an onboard radio system between train drivers and signal operators called GSMR.

National Rail said: ‘Trains across the network are having to start their journeys later because of this fault and some may also be subject to cancellations or alterations.’

The morning has already been bad for commuters. Several key London Underground and Overground lines have been smacked by a double-whammy of closures and delays.