A woman has been flown to a London hospital following a multi-vehicle crash involving a lorry and a van on the M25.

Drivers heading into Kent via the QEII Bridge near Dartford are still facing delays - hours after the incident happened at about 4pm.

Traffic was held on the M25 clockwise between junction 29 for Upminster, across the Dartford Crossing to the A282 junction 1B for Dartford.

It allowed for emergency services, including the air ambulance, to work at the scene.

Drivers were experiencing delays of more than two hours this evening, with 11 miles of congestion reported at one stage.

National Highways warned the road was expected to remain closed for “some time”.

Those heading clockwise that were caught within the closure were released when it was safe to do so.

As of 8.30pm, the section of the motorway had reopened but one lane of four remained shut.

Anti-clockwise traffic was also held for almost an hour to allow for the air ambulance to land. All lanes were reopened by 9pm.

Police have confirmed they were called at about 4pm.

A spokesman added: “Officers attended and one woman has been taken to a London hospital for treatment.

“There is currently heavy congestion in the area and motorists are advised to find alternative routes if possible.”

It is understood the woman’s injuries are not life-threatening.

A SECAmb spokesman said: “We were called shortly after 4pm yesterday to reports of a RTC involving a lorry and a van near the Dartford bridge.

“Crews arrived and assessed and treated two people at the scene, before they were joined by the Air Ambulance Charity, Kent, Surrey, Sussex who airlifted one person to Kings College Hospital for further medical treatment.”