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Britain's winter blackout risk the lowest in six years but 'tight' days expected

Britain's electricity margins are the strongest since 2020, with a 900-megawatt surplus easing blackout risks despite expected supply constraints in early December and mid-January.

  • Great Britain's National Energy System Operator warned of potential 'tight days' for energy supply this winter, although new battery storage is expected to help meet demand.
  • The National Energy System Operator reported that electricity margins are at their strongest level since 2020, but indicated that tighter periods may still occur.
  • Gas network operator National Gas stated that gas demand is expected to be 3% lower than last winter, easing pressure on supply.
  • Deborah Petterson from Neso emphasized the need to prepare for potential energy challenges while maintaining a resilient energy supply.
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The Independent broke the news in London, United Kingdom on Wednesday, October 8, 2025.
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