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Cause of Heathrow Power Outage Fire Remains Unknown, Interim Report Confirms

An interim investigation rules out foul play but leaves the root cause of the March substation fire undetermined, with a full report expected by June's end.

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Overview

  • The National Energy System Operator's interim report confirms the March substation fire that shut down Heathrow Airport was not caused by suspicious activity.
  • The fire at the North Hyde substation disrupted over 1,350 flights, impacted nearly 300,000 passengers, and left 67,000 homes without power.
  • Power was restored to Heathrow terminals by 10:56 AM on March 21, but flights did not resume until approximately 6 PM, following safety checks.
  • The investigation continues to examine the maintenance history and design of the substation to determine compliance with legal standards.
  • Heathrow Airport and government officials are pressing for answers in the final report to address vulnerabilities and bolster UK energy grid resilience.