The head of Britain's electricity and gas systems' operator has told households to prepare for blackouts between 4pm and 7pm on weekdays during "really, really cold" days in January and February if gas imports are reduced.
John Pettigrew, the National Grid chief, said blackouts would have to be imposed during the "deepest darkest evenings" in January and February if electricity generators did not have enough gas to meet demand, especially if there is a period of cold weather.
His comments were made at the Financial Times's Energy Transition Summit on Monday.
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