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Walthamstow fire: Blaze rips through cannabis factory in house in north-east London

About 80 firefighters used 12 engines to control a blaze that destroyed half the house, with the cause under investigation, London Fire Brigade said.

  • Shortly after 2:50am on August 22, firefighters were called to tackle a blaze in a mid-terraced house on Knebworth Avenue, Walthamstow, which was believed to be operating as an illicit cannabis cultivation site.
  • The blaze likely started due to illegal electric wiring used to grow cannabis plants, which often causes hazardous fires in top floors or lofts.
  • Approximately eighty firefighters supported by a dozen fire engines from various north-east London fire stations worked to extinguish the blaze, which destroyed two floors and damaged half of the roof before being brought under control by 4:51am.
  • A representative from the London Fire Brigade explained that fires at cannabis cultivation sites pose significant hazards because offenders often rig unsafe electrical connections to steal power, increasing dangers for firefighters.
  • Investigators continue to determine the exact cause, while the brigade urges the public to recognize key signs of cannabis factories and report them to police promptly to prevent such fires.
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GB News broke the news in London, United Kingdom on Friday, August 22, 2025.
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