National Grid has said it will 'learn the lessons' after nearly one million people across England and Wales lost power on Friday. But director of operations Duncan Burt told the BBC that its systems 'worked well' after the 'incredibly rare event' of two power stations disconnecting. He said he did not believe that a cyber-attack or unpredictable wind power generation were to blame. Regulator Ofgem has demanded an 'urgent detailed report' into what went wrong. It said it could take enforcement action, including a fine, after train passengers were stranded, traffic lights failed to work and thousands of homes were plunged into darkness during the blackout. Some train services continued to be disrupted on Saturday morning.
The company says the power cut affecting nearly a million people was an "incredibly rare event".