A woman in her forties has been badly injured in a crash between junctions 16 and 17 on the M25 this morning.

Police are appealing for witnesses to the accident which happened around 11.20am

It was near the junction with the M40 headed in a clockwise direction.

A silver Ford Transit van was in a collision with a red Citroen Berlingo camper van.

Three fire engines from Slough and Langley, two ambulances and a helicopter attended the scene.

The woman in the camper van was taken to John Radcliffe Hospital, Oxford with life-threatening injuries.

Her next of kin have been informed.

The driver of the Transit van was not injured.

Investigating officer Sergeant Matthew Cadmore of the Roads Policing Unit based in Taplow, said: “Although the roads were not as busy as normal at this time of the day, we do believe a number of people on either side of the carriageway may have seen this incident.

“We would like to speak to anyone who saw either the Transit van or the camper van before the incident.

“We’d also like to speak to anyone who witnessed the collision and would ask drivers to check their dash-cam footage.

“If you think you can help with this investigation, please contact Thames Valley Police on the non-emergency number 101, or make a report online, quoting the reference 326 (26/3).”