Urgent warning over major motorway closure as drivers could face extra charge

The four-mile portion M25 will close between 9pm on Friday evening and 6am on Monday morning.

This will mark just the second time that part of the M25 will have fully shut down during daylight hours in its 50-year history.

A diversion will take cars on a 19-mile journey on A roads, crossing from Surrey into South London.

However, drivers have been warned that the new route could carry them into London's ultra-low emission zone (ULEZ).

While the new route will benefit from an exemption, authorities have said that Brits could be charged if they stray from the official diversion.

National Highways said that anyone ignoring diversion signs in an attempt to find shorter alternative routes will be liable for the £12.50 daily ULEZ fee if their vehicle does not meet minimum emissions standards.

General advice is to avoid driving if possible

Alice SimpsonRAC

Failure to pay when required can result in a £180 fine, reduced to £90 if paid within 14 days.

Jonathan Wade, senior project manager at National Highways, said: "Although the [ULEZ] cameras will be active, no enforcement action will be taken.

"However, if you ignore the diversion signs and do your own thing, then if your vehicle's not compliant you do run the risk of getting caught.

"You'll be perfectly safe as long as you follow the diversion routes."

M25 closed- Travel chaos as part of major motorway is shut for first time ever today with urgent warning for drivers

Drivers are now being advised to avoid the area if possible over concerns that sat navs may direct them onto minor roads after leaving the M25.

They could be detected by other ULEZ cameras as well as risk creating gridlock in residential areas.

This weekend will see the second of five planned closures of the M25 - which encircles London - on sections connecting with Junction 10 as part of a £317 million improvement project.

During the first planned closure - between Junctions 10 and 11 - in March, traffic levels were more than two-thirds lower than normal.

This time, it will be the stretch between Junctions 9 and 10 that is affected.

Other stretches of the M25 will also be disrupted this weekend due to ongoing work to retrofit additional emergency stopping areas on smart motorway sections.

Wade explained that the Junction 10 work can be halted at various points throughout the weekend if it runs behind schedule, as "we wouldn't jeopardise opening the M25 on Monday morning".

Alice Simpson, a spokesperson for RAC, said that drivers could face "up to six days of disrupted travel" as the M25 closure follows national rail strikes which are expected to spark increased traffic levels.

She went on: "While the general advice is to avoid driving if possible, people will still need to make essential journeys for work, to access medical care and to reach Gatwick and Heathrow airports.

"Planning ahead is absolutely vital. Rather than relying on a sat nav, check the planned diversion routes ahead of time and be prepared for long delays.

"It's also a really good idea to check your vehicle's oil and coolant levels, tyre pressure and tread depth all before setting off to reduce the chances of a very unwelcome breakdown."

Three more weekend closures of the M25 will take place between August and the end of the year.

The project, due to be completed in the summer of 2025, will increase the number of lanes and make it easier to enter and exit the M25 at Junction 10, which is one of the UK's busiest and most dangerous motorway junctions.