On 22 August 2025, a major fire broke out at a residential property on Knebworth Avenue, Walthamstow. The house is believed to have been used as a cannabis factory.

London Fire Brigade responded with 80 firefighters and 12 fire engines to control the blaze, which destroyed much of the house, including the ground floor, half of the first floor, and the roof. The fire was under control by 04:51 AM. No injuries were reported.

The presence of illegal wiring and equipment used for cultivation added serious risks to the incident. A police investigation is ongoing, and a crime scene remains in place. Authorities urge residents to report any signs of illegal activity.

This event highlights ongoing challenges related to unregulated cannabis cultivation in residential areas and the dangers they pose to public safety.