Motorists are being advised to avoid a major motorway due a serious crash.

Police and ambulance crews are on scene of the crash which has resulted in serious injury and officers are advising motorists to avoid the area for at least four hours.

The crash has taken place on the anticlockwise carriageway of the m25 at junction 28.

The road is completely closed and diversions are in place.

Traffic is slow on the clockwise carriageway due to people slowing to look at the crash.

Motorists are advised to avoid the area or allow extra time for travel.

We will bring you more information as soon as possible.