Nationwide train chaos to last for HOURS: 'Faulty hardware' on £1.9bn communication system is behind meltdown that has left holidaymakers scrambling to get to London airports and commuters told 'get a

* Have you faced rail delays this morning? Please email: tips@dailymail.com * Rail passengers across Britain faced major disruption during rush-hour this morning due to 'faulty hardware' on a radio system used by train drivers and signallers. A notice on the National Rail website said: There is a nationwide fault with the communication system used between train drivers and signallers. Passengers at London Euston railway station wait for updates on train services today Passengers wait at London King's Cross today during the communications system fault Passengers wait for National Rail services at London Waterloo station this morning Rail passengers at London Victoria station wait for updates today amid the systems fault The failure with the GSM-R system 'is currently being investigated', National Rail said. Earlier, a Network Rail spokesperson had said: 'We have discovered a fault with the railway's radio communication system that is preventing it from automatically 'logging on'.