M25 to be closed for the third weekend – here’s where and when

The road will be closed again

Engineering works taking place at the A3 Wisley interchange at Junction 10 of the M25 as concrete beams for a new bridge are installed (Jordan Pettitt/PA) (PA Wire)

A third weekend closure of part of the M25 has been announced.

Drivers have been warned of delays as the works shut the motorway to enable the construction of a new bridge.

National Highways said it will shut the motorway between Junctions 10 and 11 in Surrey from 9pm on Friday July 12 to 6am on Monday July 15.

This will be the third of five weekend closures of the motorway – which encircles London – as part of a £317 million project to improve Junction 10.

Motorway vehicles will be directed along a diversion route on A-roads.

Among the people affected will be many of those travelling to, from and between the UK’s two busiest airports, Heathrow and Gatwick.

There were fears of severe congestion on diversion routes ahead of the first two closures in March and May, but many drivers followed advice to avoid the area, meaning long hold-ups were avoided.

A map of the M25 Closure diversion routes (PA Wire)

National Highways said in a statement: “We’re grateful to all drivers who avoided previous closures and completed their journeys in other ways. We urge you to do the same again.

“If you do travel, expect delays and please leave a lot of extra time for your journey.”

National Highways senior project manager Jonathan Wade 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 is concerned that satnavs could direct some drivers on to minor roads after leaving the M25, creating gridlock in residential areas.

A third weekend closure of part of the M25 has been announced (Gareth Fuller/PA) (PA Wire)

The March closure was the first planned daytime shutdown of the M25 since it opened in 1986.

The project, due to be completed in summer 2025, will increase the number of lanes at Junction 10, which is one of the UK’s busiest and most dangerous motorway junctions.

Between 4,000 and 6,000 vehicles normally use the M25 between Junctions 9 and 11 in each direction every hour from 10am until 9pm at weekends.

The final two weekend closures as part of the project will take place later this year.