A notorious stretch of M4 was the scene of a third accident in two weeks last night. (Sunday).

Three cars were involved in an accident soon after 6pm between junctions 4 and 4b , causing a build up of traffic back as far as Slough at junction six within minutes.

Firefighters from Berkshire and London, two ambulance crews and an ambulance officer were soon on the scene.

No-one was trapped or seriously injured but three people were treated on the scene. They did not need to go to hospital.