The M25 in Hertfordshire has been closed in both directions following a Metropolitan Police-led incident,...

Published: 1:23 pm March 1, 2025
Updated: 12:52 pm October 8, 2025
M25 Closed in Hertfordshire Due to Police-Led Incident, Causing Severe Delays

The M25 in Hertfordshire has been closed in both directions following a Metropolitan Police-led incident, causing long delays of up to 45 minutes.

The closure affects the clockwise carriageway between Junction 23 (A1M J1/Barnet) and Junction 25 (Waltham Cross), as well as the anti-clockwise carriageway at Junction 25. Emergency services, including an air ambulance, have attended the scene.

Diversion Routes in Place

Authorities have put diversion routes in place for affected drivers:

Clockwise Diversion (Hollow Square Symbol)

  • Exit M25 at J23 and take the A1 towards London.
  • Follow the A1 through Stirling Corner, Apex Corner, and Mill Hill Circus to Fiveways Corner.
  • Bear left onto the A1 towards Henlys Corner, then continue onto the A406 North Circular Road towards Wood Green.
  • Follow the A406 to Great Cambridge Junction, exit onto the A10 towards Hertford, and rejoin the M25 at J25.
  • Note: There is a height restriction of 4.7m at the A406 Railway Bridge.

Anti-Clockwise Diversion

  • Traffic must exit and re-enter the M25 at J25 via the slip roads.

Severe Delays Expected

Drivers are facing 45-minute delays on approach in both directions. Motorists are advised to allow extra travel time, seek alternative routes, or delay their journeys if possible.

Further Updates and Travel Information

Live updates and further information can be found on:

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