Two lanes of the M25 have reopened clockwise following a serious accident but severe delays remain.

The accident involving six lorries happened between Junction 25 (Enfield) and Junction 26 (Waltham Cross) and closed all lanes clockwise for a time.

Queues stretch back to Junction 23 for the A1(M) with delays up to 80 minutes expected.

One lane anti-clockwise is also closed and emergency services remain at the scene.