M25 traffic LIVE: Major motorway in chaos after horror crash

Drivers on the M25 are facing gridlocked traffic following a rush hour crash.

The anticlockwise carriageway is partially blocked after an accident at J21A (St Albans) this evening.

Traffic indicator Inrix says there are "severe" delays along both carriageways, with tailbacks to junction 23.

For all the latest updates, follow our live blog below.