M25 weekend closure with full diversion route and exactly where junction 10 and 11 are

Part of the M25 will be closed throughout the entire weekend starting this Friday (July 12) as a new bridge is being built and a diversion route has been set up to avoid the disruption. The London orbital motorway will be shut between Junction 10 and 11 in Surrey from 9pm on Friday, 12 July to 6am on Monday, July 15.

A new bridge is being built at the roundabout for Junction 10 in a £317 million improvement project. National Highways has advised drivers to only travel if necessary and to follow their diversion route instead of satellite navigation system diversions as this will be key to reducing congestion.

This is the third of five full weekend closures of the M25 to take place with a further two due later this year. Two happened earlier this year in May which saw identical work being carried out on the eastern gyratory.

READ MORE: Full list of all the major London Underground disruptions taking place throughout July 2024

Where are Junctions 10 and 11?

Let's first establish where exactly Junction 10 and 11 on the M25 actually are. Junction 10 is on the south eastern section of the M25 near Cobham and its legendary service station. The A3 Portsmouth Road intersects the motorway here leading towards Guilford.

The motorway is due to be closed between Junction 10 and Junction 11. Junction 11 is intersected by St Peter's Way towards Addlestone about 5 miles along from Junction 10 in the clockwise direction.

What is the official diversion route?

If you're going in the clockwise direction on the M25, i.e. from Junction 10 to Junction 11, National Highways have set out the following route: exit the M25 at J10 and take the 3rd exit to the north bound A3 to the A245 Painshill Junction, A245 towards Woking, and Byfleet, then at the Six Crossroads Roundabout take the 5th exit to the A320 continuing to M25 Junction 11 where the diversion will end.

If you're going in the anticlockwise direction on the M25, i.e. from Junction 11 to Junction 10, National Highways have given this alternate route: exit the M25 at J11 and take the 3rd exit to the A320 south towards Woking, then at the Six Crossroads Roundabout take the A245 towards Byfleet, continue on the A245 to the A3 Painshill junction, then take the 3rd exit to the southbound A3 to Junction 10 where the diversion will end.

Why is a new bridge needed and what will it be like?

The new bridge, consisting of 68 beams, each weighing 16 tonnes, and another four beams weighing 40 tonnes, will be installed as part of ongoing work to make journeys safer and reduce pollution, National Highways said.

Jonathan Wade, National Highways Senior Project Manager, said: “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.”

National Highways and delivery partner Balfour Beatty Atkins are working with key stakeholders in the lead up to this closure, including emergency services, Surrey County Council, local businesses and Gatwick and Heathrow Airports. Local residents, holidaymakers, concertgoers and sports fans should plan their journeys in advance and make sure they allow extra time or make alternative travel arrangements, National Highways advised.

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