Four-vehicle smash blocks motorway at Watford

Four-Vehicle Crash Blocks M25 Near Watford

A serious collision involving four vehicles has led to the closure of the M25 near Watford, causing significant traffic disruption.

Incident Details

The anti-clockwise carriageway of the M25 is closed within Junction 20, near the A41 interchange. National Highways reported around 50 minutes of delays as of 8:30 p.m. Traffic is being diverted through the exit and entry slip roads at Junction 20.

“We are currently dealing with a high volume of traffic on the M25 anticlockwise at Junction 20 (Watford/Kings Langley) following a road traffic collision. We would ask you to please avoid the area at this time.” — Hertfordshire Police spokesperson

Response and Impact

Police units and the East of England Ambulance Service are present at the scene. Congestion, which reached about five miles as of 8 p.m., is now extending back toward the M1. Motorists are being urged to seek alternative routes.

Additional Local Updates

Author’s summary: A four-car crash shut down part of the M25 near Watford, triggering heavy congestion and prompting police to advise drivers to avoid the area.

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Watford Observer Watford Observer — 2025-11-09