M25 completely shut after air ambulance called to 'multi-vehicle' crash - recap

M25 Closed After Multi-Vehicle Crash

The M25 was temporarily closed after a multi-vehicle accident prompted the arrival of an air ambulance. The incident led to significant disruption and long delays in both directions.

Incident Details

According to National Highways, the crash occurred on the M25 anticlockwise between Junction 25 (A10 Great Cambridge Road, Enfield) and Junction 24 (A111 Stagg Hill, Potters Bar). Initially, all lanes were closed as emergency services responded, but most lanes have since reopened.

"The M25 is CLOSED anti-clockwise between J25 (#WalthamCross) and J23 (#PottersBar) due to a collision. Delays of 60 mins, 4 miles of congestion. The injury is not as serious as initially feared."

Traffic Conditions

Traffic monitoring site Inrix reported severe delays, with one lane remaining closed and around four miles of slow-moving vehicles. Delays of approximately 20 minutes persisted even after partial reopening. Congestion extended to Junction 26 (Waltham Abbey), and there was slow-moving traffic on the opposite side due to onlookers.

Official Updates

National Highways confirmed that an air ambulance attended the scene but noted the situation was “not as serious as initially feared.” The agency’s social media accounts estimated delays exceeding an hour during peak response time, with closures affecting the clockwise carriageway between Junctions 23 and 25 for the air ambulance’s arrival.

Current Situation

As of the latest update, three out of four lanes are open and delays have reduced to about 20 minutes. Motorists are still advised to plan their journeys carefully and allow extra travel time.

Author’s summary: Traffic on the M25 was severely disrupted after a multi-car crash required an air ambulance, though injuries were later deemed less serious than first feared.

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Essex Live Essex Live — 2025-11-08

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