POLICE are advising motorists to avoid the M25 following a collision anti-clockwise between junctions 28 and 27.

A collision between a motorcycle and an articulated lorry occurred just before 7.30am this morning, Thursday, July 18.

The road was closed in both directions to allow landing of the air ambulance. The motorcyclist was air lifted to the Royal London hospital with serious injuries.

The clockwise carriageway is now open, as is one lane of the anti-clockwise track.

Officers are working as quickly as possible to open the rest of the road, however motorists are advised to avoid the area and find alternative routes.