UK commuters: tell us how you have been affected by the National Rail systems fault

A South Western Railway train passes over the River Mole as it makes its way to Dorking. Photograph: Dan Kitwood/Getty Images

Network Rail has said a “nationwide” fault with the communication system used between train drivers and signallers could cause disruption across the network.

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

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