POLICE are appealing for witnesses following a crash on the outskirts of Hillingdon.

They were called by the ambulance service at 7.03pm last night (Monday) to Stanwell Moor Road, Longford, near Heathrow, after a motor cycle had collided with a car.

The rider, in his mid-30s, was taken to a central London hospital, where his condition is described as critical.

The driver stopped at the scene.

At this early stage, it is believed the motor cycle was travelling northbound before crossing the central reservation. The road would have been busy at that time.

Anyone who witnessed the collision or the moments leading up to it is asked to contact the witness appeal line on 020 8991 9555.