If you’re a fleet driver or manage a fleet of vehicles, you’ll want to pay close attention to the upcoming M25 closure this weekend. The UK’s busiest motorway is shutting down between junction 10 (Wisley) and junction 11 (Chertsey) — and it’s expected to cause significant delays. Here’s everything you need to know to keep your business moving and avoid getting caught in traffic.
Why Is the M25 Closing Again?
The closure is part of the ongoing Junction 10 improvement project — a major infrastructure upgrade designed to improve safety and traffic flow on the M25.
The project will:
- Increase the number of lanes to ease congestion
- Improve entry and exit points at junction 10
- Provide safer access to Wisley, Pyrford, Old Byfleet, and RHS Garden Wisle
- Help reduce pollution caused by traffic jams
This weekend’s closure will allow old bridges to be demolished — so while it’s disruptive now, it should make journeys smoother in the long run.
When and Where Is the Closure Happening?
- Start: 9pm on Friday, 21 March
- End: 6am on Monday, 24 March
- Affected section: M25 between junction 10 (Wisley) and junction 11 (Chertsey) — closed in both directions
Official Diversion Routes
National Highways has provided official diversion routes — and it’s important to follow them instead of your sat-nav, which could lead you onto unsuitable roads.
Diversion for Clockwise Traffic:
- Exit the M25 at junction 10
- Take the A3 northbound
- Follow the A245 at Painshill
- Take the A320
- Rejoin the M25 at junction 11
Diversion for Anticlockwise Traffic:
- Exit the M25 at junction 11
- Take the A320 southbound
- Follow the A245 at Painshill
- Head onto the A3 southbound
- Rejoin the M25 at junction 10
Tip: If possible, try using the M25 via the Dartford Crossing — it could save you some time.
What This Means for Fleet Drivers
If you’re a fleet driver or manage delivery routes through Surrey, this closure is likely to cause major disruption. Delays are almost certain, and alternative routes could become congested as other drivers try to avoid the closure.
Alice Simpson from RAC Breakdown advises fleet drivers to plan ahead and explore alternative routes where possible:
“This weekend’s closure could cause serious delays, we recommend adjusting schedules where possible and using official diversions rather than relying on sat-navs.”
Fleet managers should also expect potential knock-on effects on delivery times and driver schedules.
Advice from National Highways
Jonathan Wade, senior project manager at National Highways, expressed gratitude to drivers who followed diversion advice during previous closures and stressed the importance of planning ahead:
“We understand the inconvenience, but this work will ultimately benefit millions of road users. Please follow the official diversions and avoid unnecessary journeys if you can.”
National Highways also warns that delays are likely even on diversion routes, so fleet drivers should allow extra time for all trips this weekend.
FAQs About M25 Closures
Why is the M25 closing this weekend?
The M25 is closing for bridge demolition as part of the ongoing Junction 10 improvement project, which aims to reduce congestion and improve safety.
How long will the M25 closure last?
The closure will start at 9pm on Friday, 21 March and finish by 6am on Monday, 24 March.
What’s the best way to avoid the M25 closure?
Follow the official diversion routes provided by National Highways. You could also try using the M25 via the Dartford Crossing if it’s quicker.
How will this affect fleet drivers?
Fleet drivers should expect delays and plan alternative routes in advance. Following official diversions and allowing extra time is crucial to avoid disruptions.
Final Thoughts
While this M25 closure is likely to be frustrating, it’s all part of making the motorway safer and more efficient in the long term. For fleet drivers, the key is to plan ahead, follow the official diversions, and allow extra time for journeys. If you manage a fleet, Fleet Service GB can help you stay one step ahead — keeping your business moving, even when the roads aren’t. For more information on our FSGB Fleet management programme contact us today!
