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Evening Standard
Evening Standard
National
Tamara Davison

Heathrow fires: What caused the substation blaze which led to travel chaos

Heathrow Ofgem Electricity National Grid Neso

Heathrow Airport is thinking about taking legal action against National Grid following a new report that shed light on the cause of a fire earlier this year that grounded flights.

In March 2025, thousands of passengers were stranded at Heathrow and other airports worldwide after a nearby substation fire left the London airport without electricity.

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