Firefighters and police investigating cause of fire that led to Heathrow shutdown
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Firefighters and police investigating cause of fire that led to Heathrow shutdown

Published by Global Banking & Finance Review

Posted on March 21, 2025

2 min read

· Last updated: January 24, 2026

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Fire Investigation at Heathrow Causes Airport Shutdown

LONDON (Reuters) -London firefighters are working with police to investigate the cause of a huge fire at an electrical sub-station which shut down Heathrow Airport on Friday, a fire-fighting chief told reporters.

Huge orange flames and plumes of black smoke shot into the sky around 11 p.m. (2300 GMT) on Thursday as a blaze engulfed the substation.

"The fire involved a transformer comprising 25,000 litres of cooling oil fully alight," Jonathan Smith deputy commissioner at the London Fire Brigade.

"This created a major hazard due to the still live high voltage equipment and the nature of the oil-fueled fire."

That forced Heathrow, Europe's busiest airport, to shut, disrupting flight schedules around the world and prompting speculation as to what had caused the blaze.

British energy minister Ed Miliband said earlier on Friday there was no suggestion that there was foul play involved.

Asked whether the police were investigating the cause of the fire as a possible terrorist incident, Smith said he was unable to comment.

"All I can say, is the Metropolitan Police are investigating the cause of this fire, ably assisted by our fire investigation officers," he said.

Smith said 10% of the original fire remained alight and his officers were working to safely resolve the incident, adding that they would work with National Grid as they assess the site and attempt to restore power.

(Reporting by Sarah Young; Editing by Kate Holton)

Key Takeaways

  • A fire at a London substation led to Heathrow Airport's shutdown.
  • Firefighters and police are investigating the cause of the fire.
  • The fire involved a transformer with 25,000 litres of cooling oil.
  • No foul play is suspected according to the energy minister.
  • Efforts are ongoing to restore power and resolve the incident.

Frequently Asked Questions

What is the main topic?
The main topic is the investigation of a fire at a London substation that caused Heathrow Airport to shut down.
Was foul play suspected in the Heathrow fire?
No foul play is suspected according to British energy minister Ed Miliband.
What caused the Heathrow shutdown?
A fire at an electrical substation in London led to the shutdown of Heathrow Airport.

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