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

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.

The government has chosen Heathrow’s third runway proposal, despite negative implications such as M25 chaos and higher costs for passengers