Thieves risk their lives to steal cable from the railway, which brings them little financial reward but costs taxpayers millions each year and causes misery for rail passengers. When a live cable is cut, it can cause a power failure on the network, turning all signals powered by the damaged cable to red and bringing trains to a standstill.  This makes it safe for passengers and teams on the track investigating the problem, but can lead to lengthy, frustrating delays while engineers repair or replace the cable."

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