A fire suppression system apparently malfunctioned at a Heathrow hangar.
The incident occurred as a British Airways Boeing 777-200ER was parked.
https://www.facebook.com/AeronewsGlobal/videos/273416027018542/?t=16&v=273416027018542
The footage, posted by Aeronews is showing retardant spraying from outlets while G-YMMB was parked
