M25 traffic live: Air ambulance lands after 'serious' crash shuts motorway with severe delays

A "serious" multi-vehicle crash has shut part of the M25 , causing severe delays as emergency services respond to the scene.

The motorway is closed clockwise between Junction 23 at South Mimms and Junction 25 at Enfield following the collision, which was reported shortly after 5pm this evening.

An air ambulance attended the scene, with the carriageway held to allow it to land safely. A serious injury has been confirmed, while police, ambulance crews, firefighters and National Highways traffic officers are responding.

There is currently no estimated reopening time. Drivers are being advised to allow extra time for their journeys, with congestion reported back towards Junction 22 at St Albans and London Colney and delays through Potters Bar and Colney Heath.

Follow our live blog below for the latest updates on the crash, road closures and traffic disruption.

A driver has said he is still stuck in a queue that began at 7pm as a National Highways assistant says that the lanes have reopened.

The assistant replied to a message on X saying: "Traffic was stopped to allow Police and Traffic Officers to remove the remaining lane closures in place. All lanes have now reopened, and traffic is passing the scene in all lanes."

Before a man replied: "What?? I’ve literally been sitting here since 7pm, nothing is open and no traffic is moving?"