A serious collision has led to the closure of a significant portion of the M25 in Hertfordshire, resulting in extensive traffic delays on the motorway. The anti-clockwise route between junctions 23 (A1M, South Mimms) and 22 (St Albans) is currently shut, as confirmed by National Highways.
Emergency response teams, including Hertfordshire Police, are actively managing the situation, with National Highways Traffic Officers present to assist with traffic control. The closure is a result of a severe crash involving a motorcycle, as reported by National Highways, with ongoing presence of Hertfordshire Police and East England Ambulance Service at the scene.
Motorists are encountering hour-long delays near junction 23, with a 6-mile build-up of traffic. Those affected are advised to follow the designated diversion symbol for alternate routes. Drivers are urged to prepare in advance, consider alternative routes, or postpone their journeys if possible.
The M25 closure persists between South Mimms and St Albans, with National Highways cautioning drivers to anticipate delays. The anti-clockwise section from junction 23 to junction 22 remains inaccessible due to the serious collision.

