Drivers on the M25 and A1(M) may need to be aware of these planned closures for the next fortnight.

Late journeys on the M25 between junction 20 and 21 (Hemel Hempstead, A41 and M1) are likely to be delayed by between 10 and 30 minutes from Monday, July 22, until Saturday, July 27.

The carriageway will be shut for reconstruction and repairs, with a diversion route in place via local authority roads, from 10pm until 5.30am Monday to Thursday and 11pm until 6am on the Friday night.

There will also be associated lane closures and slip road closures.

See the full list of motorway closures near Watford below:

  • M25, from 10pm July 22 to 6am July 27, moderate delays (10-30 minutes). Clockwise, junction 20 to junction 21.
    Lane closures, slip road closures and carriageway closure for resurfacing works. Diversion via local authority roads.
  • M25, from 10pm July 8 to 6am August 1, moderate delays (10-30 minutes). Clockwise, junction 23 to junction 24.
    Lane and slip road closure for NEAR Scheme. Diversion via National Highways roads.
  • M25, from 10pm July 16 to 5am July 17, slight delays (under 10 minutes). Anticlockwise, junction 22 to junction 23.
    Lane closure for technology replacement works.
  • A1(M), from 10pm July 8 to 6am July 13, moderate delays (10-30 minutes). Northbound, junction 1 to junction 3.
    Lane closures, slip road closure and carriageway closure for concrete repair works. Diversion via National Highways and local authority roads.