New Surrey M25 closure dates announced
National Highways is continuing the major improvement work at junction 10 of the motorway at Wisley and say work to complete the project has been delayed until Spring next year
Last updated 10th Feb 2025
National Highways has announced more closures from February to April as their junction 10 improvement project moves towards completion
Their work in the coming months includes shutting the motorway for two full weekends in March 2025, as they did on three occasions last year.
Here's what they're doing and when:
21 to 24 February - M25 junction 10 slip road closures
They'll close all junction 10 entry and exit slips.
You'll be able to travel on the M25 through the junction, but you won't be able to join or leave it.
7 to 10 March and 21 to 24 March - M25 junction 10 (Wisley) to 11 (Woking) full weekend closures
They say they need these weekend closures to demolish and remove old bridges. They'll take place from:
Friday 7 March - Monday 10 March
Friday 21 March – Monday 24 March
11 to 14 April - A3 northbound closure
They'll close the A3 northbound both directions between Junction 10 and Cobham Roundabout/A245
They'll announce diversion routes for each of these closures on this page closer to each weekend.
Final block
Jonathan Wade, National Highways Senior Project Manager, said: “This is the final block of closures on the M25 as this scheme nears completion.
“We were grateful to drivers who listened to our advice during the three weekend closures last year and I’d again urge them to only use the motorway if their journey is absolutely necessary.
“Unfortunately, it’s simply not possible to carry out this scale of infrastructure improvement, which will benefit millions of people in the long term, without there being some degree of short-term disruption.
“We have spent months planning these closures, but they will still cause significant congestion and delays, so we are asking road users to allow extra time and use alternative routes where possible. Please follow our official diversion routes and not information from satnavs.”
Delay
While the fundamental elements of the scheme which affect drivers day-to-day are still expected to be finished this summer, the final completion date for the project has now been moved back to spring 2026.
Mr Wade added: “Periods of extreme weather in 2024 delayed some elements of our work but since then we’ve worked hard to recoup that time and still complete the on-road elements on schedule.
“We are already seeing some of the benefits of this project, which will help reduce congestion, create a smoother flow of traffic and provide safer journeys for thousands every day.”
The Junction 10 improvement scheme will see an increase in the number of lanes to make journeys safer and improve traffic flow.
It will also make it easier and safer to enter and exit the M25, provide safer entry roads for Wisley, Pyrford, Old Byfleet and the RHS Garden Wisley, and will reduce the pollution caused by traffic jams.
Diversion routes for each of these closures will be announced and published closer to each weekend.