Armed police have responded to a major incident at Heathrow Airport in London as several areas have been locked down while witnesses report that someone 'sprayed an unknown gas'

A major incident is unfolding at Heathrow Airport with armed police at the scene and drivers urged not to leave their vehicles at Terminal 3 car parks

A major incident is taking place close to Heathrow Airport as drivers are being urged not to leave their cars. Armed police are said to be at the scene. Heathrow tunnels are closed with LUL and Elizabeth Lines suspended. Drivers of buses trapped inside the station are advised not to leave their vehicles under any circumstances

Searches continue for more suspects, after armed police arrested a man at a Heathrow Airport car park on suspicion of a "pepper spray assault". A total of 21 people were treated, with five taken to hospital.

Heathrow Tunnel was closed in both directions on Friday morning due to a collision - prompting traffic woes for many. Huge delays were expected for drivers heading to the major airport 's terminals 2 and 3 on the M4 Heathrow Spur.