A major disruption on the UK’s rail network has caused delays on at least eight lines on Friday morning.

National Rail said the issue was due to a “nationwide fault” with the radio system used between train drivers and signallers.

The Elizabeth line, Gatwick Express, Great Northern, Southern, South Western Rail, Thameslink, Southeastern and ScotRail services have all been affected.

Journeys in and out of major transport hubs – including London Paddington and Victoria – have been impacted.

National Rail said travellers should plan for services to be cancelled.

It said the issue appears to be a fault with the onboard GSMR radio system, which is used to communicate in case of emergencies.

National Rail said it is investigating the cause of the fault.