Major M25 and A3 disruption as slips roads closed for three weekends

-Credit: (Image: SurreyLive)
-Credit: (Image: SurreyLive)


National Highways has announced significant disruptions at Junction 10 of the M25, where it intersects with the A3, for three upcoming weekends. While both the M25 and A3 will remain open, all slip roads at this junction will be closed, preventing drivers from joining or leaving either road at this point. This means that anyone who wants to get on or off the M25 at Junction 10 will have to travel to Junction 9 or 11.

The key closlosure dates are: October 4-7, October 18-21, November 1-4. The closures are part of the wider project to improve the area around the Wisley Interchange. The scheme began in summer 2022 and is expected to be completed in summer 2025. It hopes to reduce congestion and improve safety,

Drivers are strongly advised to plan their journeys in advance and consider alternative routes, including using the M3, M23, or A24 to access the M25. Here are the diversion routes for affected drivers:

Eastbound M25 to A3 North or South Drivers traveling eastbound on the M25 (towards Gatwick) who need to access the A3 should:

  • Exit the M25 at Junction 11

  • Follow the A320 towards the Six Crossroads roundabout (approx. 3.6 miles)

  • Take the A245 through Sheerwater, West Byfleet, and Byfleet (approx. 5.7 miles)

  • Join the A3 north or south at the Painshill Junction

  • Diversion map here.

Westbound M25 to A3 North For those traveling westbound on the M25 (towards Heathrow) needing to go north on the A3:

  • Leave the M25 at junction 9

  • Follow the A243 towards Malden Rushett and Chessington (approx. 5.3 miles)

  • At Hook Junction, turn left onto the A309 Kingston Bypass to the Scilly Isles Junction (approx. 2.1 miles)

  • Take the first exit to the A307 towards Esher and Cobham (approx. 4.5 miles)

  • At the junction with Portsmouth Road, take the second exit to the A245 towards Painshill Junction to join the A3 north

  • Diversion route map here

Westbound M25 to A3 South Westbound M25 travelers heading south on the A3 should:

  • Exit at junction 9 and follow the A24 Leatherhead Bypass south (approx. 3.6 miles)

  • At Givons Grove roundabout, take the A246 toward Guildford (approx. 8.5 miles)

  • At Clandon Crossroads, turn right onto the A247 and access the A3 South at Send Junction

  • Diversion route map here

Southbound A3 to M25 West Drivers on the southbound A3 (towards Guildford ) needing to go west on the M25:

  • Leave the A3 at Painshill junction and follow the A245 through Byfleet, West Byfleet, and Sheerwater (approx. 5.7 miles)

  • Take the fifth exit at Six Crossroads Roundabout to the A320

  • Follow the A320 to Junction 11 of the M25 (approx. 3.6 miles)

  • Diversion route map here

Southbound A3 to M25 East For southbound A3 traffic heading east on the M25:

  • Exit at Painshill junction and follow the A245 towards Painshill (approx. 0.6 miles)

  • Take the A307 towards Esher to the Scilly Isles Junction (approx. 4.5 miles)

  • Follow the A309 Kingston Bypass to the A3 Hook Junction (approx. 2.1 miles)

  • Take the A243 towards Hook and Malden Rushett to join the M25 at Junction 9

  • Diversion route map here

Northbound A3 to M25 East Northbound A3 traffic (towards London) going east on the M25 should:

  • Leave the A3 at Send onto the B2215, then take the A247 to Clandon Crossroads (approx. 2.4 miles)

  • Follow the A246 towards Leatherhead to Givons Grove roundabout (approx. 8.5 miles)

  • Take the A24 Leatherhead bypass to the junction with the A243 (approx. 3 miles)

  • Join the M25 east at Junction 9

  • Diversion route map here

Northbound A3 to M25 West For northbound A3 traffic heading west on the M25:

  • Exit at Send onto the B2215, then take the A247 Send Barns Lane (approx. 2.1 miles)

  • Follow the B382 to the junction with the A245 (approx. 2.9 miles)

  • Take the A245 to Six Crossroads Roundabout, then the A320 Chertsey road (approx. 5.4 miles)

  • Join the M25 west at Junction 11

  • Diversion route map here

National Highways warns that these diversion routes may experience delays and urges all drivers to plan their journeys well in advance.