Fleets are being warned about significant delays from scheduled closures to the M25 starting this weekend. Those travelling to London and surrounding areas are being reminded to plan their journeys well in advance, ensuring where possible to make alternative travel arrangements.
As part of a £317m three-year upgrade project, the scheme aims to ease congestion at the M25 junction 10 and A3 Wisley interchange, which is the busiest section of the M25. Over 300,000 vehicles travel through it every day.
Diversion route details can be found here, and will be updated ahead of every closure date. The recommendation is to follow National Highway’s travel advice instead of sat-nav diversions, which it says will be key to reducing congestion.
Jonathan Wade, National Highways senior project manager, said: “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.
“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.
“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.”
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