In what it called an “unlikely” scenario, the National Grid Electricity System Operator (ESO) said households and businesses might face planned three-hour outages to ensure the grid does not collapse.
If it was to happen, it would be the first time in five decades that the UK is affected by such power outages.
Blackouts famously hit the UK during the 1970s in response to the miners’ strikes and the oil crisis.
The industrial action - prompted by miners demanding pay in line with inflation rates - eventually led to Edward Heath's Conservative government imposing a three-day week in 1974 to save electricity supplies.
Those early '70s blackouts were characterised by bizarre scenes from haircuts in the street to long queues for candles. Here, Yahoo News UK digs into the picture archives to show how Britons handled the repeated blackouts.
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