A major disruption on the UK's rail network has caused delays on at least nine 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 that has now been fixed.
The Elizabeth line, Gatwick Express, Great Northern, Northern, ScotRail, Southeastern, Southern, South Western Railway and Thameslink services have all been affected.
This includes delays to journeys in and out of some of England's major transport hubs - such as Manchester Piccadilly, London Paddington and Southampton Central.