M25 junction 10

Upgrading this stretch of road will provide vital improvements to its safety and reliability. At the same time, this scheme will involve some of the most extensive environmental mitigation ever carried out by Highways England, with over 40 hectares of land being used to replace the 14 that are needed to improve the junction.

Start date Autumn 2021

End date Autumn 2023

Cost £200 million to £250 million

M25 junction 10 aerial view

Latest updates

12 May 2021

Decision deadline extended to November 2021

The Secretary of State for Transport has asked for more time to make a final decision on whether we can continue with our proposals to improve the M25 junction 10/A3 Wisley interchange.

In his statement, the Secretary of State sets out the 6-month extension is to allow for further consideration of environmental matters, and provides the new deadline of 12 November 2021.

Thank you to everyone for their engagement and contribution in the development of the scheme to date. Further information regarding the additional consultation will be posted on the Planning Inspectorate’s website.

We remain confident that our proposals will deliver much needed additional capacity, with better connectivity for people and business, and safer journeys for everyone. This junction is one of the busiest on our network, with almost 300,000 journeys every day. Due to the volume of traffic and the resulting queues, the junction and the surrounding roads have a high number of incidents.
04 May 2021

Decision update

In January 2021, the Secretary of State for Transport delayed his final decision on our proposals to improve the M25 junction 10/A3 Wisley interchange to 12 May 2021.

This four-month extension is to allow the Secretary of State to understand more detail in certain areas of our application. You can view the written statement about the extension on the Planning Inspectorate’s website.

Thank you to everyone who has got involved in the development of the scheme so far. More information about the scheme, along with the decision when it is announced, can be viewed on the Planning Inspectorate’s website.
13 January 2021

Decision date extended

The Secretary of State has extended the deadline for the decision on the Development Consent Order for improvements to the M25 junction 10/A3 Wisley interchange to 12 May 2021.

The 4-month extension is to allow the Secretary of State to consult further on specific areas of the application. View the written statement about the extension.

We look forward to the Secretary of State’s Development Consent Order decision later in the year and will continue to assist with the process over the forthcoming months. Thank you to everyone for their engagement and contribution in the development of the scheme to date. Further information regarding the additional consultation will be posted on the Planning Inspectorate’s website.

Our plans to improve the M25 at junction 10 near Wisley are good for road safety, good for the environment and good for business and jobs. The new junction will improve almost 300,000 journeys a day, making them more reliable and safer, with nearly a third fewer collisions.
12 August 2020

Scheme prepares for Secretary of State decision

The Development Consent Order (DCO) examination was completed in mid-July, having been extended by two months as a result of the impact of COVID-19. The planning inspectorate are now writing their report which is due to be submitted to the Secretary of State for Transport during October, for his consideration. The Secretary of State decision is expected on 12 January 2021 with start of works planned in spring next year.

Earlier in the year we awarded a contract to Balfour Beatty Atkins to build the scheme and we are now working on the detailed design and doing more surveys to inform this. This includes environmental surveying on land surrounding the M25 and A3, as well as surveys on the road which will be done at night when it is less busy. That means there will be night time closures of some lanes in September and October for these surveys.

Until we receive the Secretary of State’s decision we will be carrying on with the detailed design and planning how to build the scheme. You will be able to find out what the final design looks like and how we will build it at events at the start of next year.
19 March 2020

Formal examination

Our proposals for the M25 junction 10/A3 Wisley interchange were accepted by the Planning Inspectorate on 17 July 2019 for formal examination. This is a significant milestone for our scheme, as it means we’ve taken a big step towards delivering much-needed improvements on this stretch of road. You can view our planning application on the Planning Inspectorate website.

The Planning Inspectorate is half way through its examination of our scheme and this has involved multiple written questions and representations, and a series of public hearings, with the next ones due to take place 24, 25 and 26 March.

These hearings have now been postponed until further notice due to the Covid-19 outbreak. Please check the Planning Inspectorate project page for the latest information on the DCO examination.

See more updates

Project information

Our proposals will improve connections, smooth traffic flows and create safer journeys for all.

We are proposing four new slip roads for the M25 junction 10 roundabout, meaning traffic turning left can pass through the junction easily.

The M25 will increase from three to four lanes through the junction, with the A3 also becoming four lanes either side of the junction 10 roundabout. There will also be improvements to the A245, Sevenhills junction and Painshill roundabout.

Around the junction, there will be new and safer routes for pedestrians, cyclists and horse riders. Improvements will also be made to the local environment and wildlife.

These changes will improve safety, reduce traffic, smooth the flow of traffic and improve journey times. The new junction will improve almost 300,000 journeys a day, making them more reliable and safer, with nearly a third fewer collisions.

Our environmental work will leave a lasting legacy of improvements to the surrounding environment to be enjoyed for years to come.

November 2018 - Targeted non-statutory consultation

April 2019 - Additional targeted non-statutory consultation

January 2020 - Targeted non-statutory consultation