Date of July M25 full weekend closure confirmed as diversion routes in place

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


Motorway bosses have confirmed when the next full weekend closure of the M25 in Surrey will happen as work continues on the £317 million Wisley Interchange Improvement scheme. Diversion routes that drivers travelling both clockwise and anticlockwise should follow have been outlined by National Highways for the duration of the weekend.

The M25 will be shut in both directions between Junction 10 for the A3, Wisley, and Painshill, and Junction 11 for Chertsey, Addlestone, and Ottershaw. This closure will begin at 9pm on Friday, July 12 and end at 6am on Monday, July 15 - meaning it will be completed before the start of the school holidays.

The full weekend closure is needed to allow engineers to build a bridge on the western gyratory of the roundabout at Junction 10. Identical work on the eastern gyratory was completed in an earlier closure in May.

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The July dates come as the third of five full weekend closures in 2024 following previous ones in March and May. Local residents, people planning to go to sports and other events, and those travelling to or from Gatwick or Heathrow airports have been advised to allow extra time for their journeys or to make alternative arrangements.

Motorists have also been warned to expect delays and to only travel if necessary. Drivers have again been urged to ignore their satnavs and to follow signed routes to reduce congestion on local roads during the closure.

The new bridge that will be installed in the July closure consists of 68 beams, each weighing 16 tonnes, and a further four beams weighing 40 tonnes. National Highways senior project manager Jonathan Wade outlined: “The previous two closures have gone well with significant progress being made during both.

“We would urge all drivers to follow the official diversion route as this is the best chance of reaching your destination in good time. Please ignore your satnavs and follow our diversion route instead.”

Diversion routes

Clockwise - Junction 10 to 11

  • Exit the M25 at J10

  • Take the third exit for the A3 northbound to the A245 Painshill Junction

  • Follow the A245 towards Woking and Byfleet

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

  • Continue to the M25 Junction 11 where the diversion will end

Anticlockwise - Junction 11 to 10

  • Exit the M25 at J11

  • Take the third exit to the A320 south towards Woking

  • Take the A245 at the Six Crossroads Roundabout towards Byfleet

  • Continue on the A245 to the A3 Painshill Junction

  • Take the third exit to the southbound A3 to Junction 10 on the M25 where the diversion will end

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