As you are aware from previous communications, National Highways is delivering the M25
Junction 10 Upgrade scheme.
Since the start of the project, we’ve successfully completed five weekend closures of the
M25, three weekend closures of the entire Wisley interchange junction 10, and three
weekend closures of the A3.
Whilst we don’t have any more planned full weekend closures of the M25 or the junction
10 interchange, we do still require three further weekend closures of the A3 between now
and the end of the year. This letter is to provide details of the next two A3 closures.
We’ll be closing the A3 in both directions between the M25 junction 10 Wisley Interchange
and the Painshill roundabout at Cobham over two full weekends in June and July to enable
us to safely install a gantry and to build the new Redhill Road bridleway bridge over the
A3. The closures will take place from:
- 9pm Friday 20 June to 6am on Monday 23 June 2025
- 9pm Friday 04 July to 6am on Monday 07 July 2025
A clearly signed diversion route will be in place throughout each closure.
Registered office Bridge House, 1 Walnut Tree Close, Guildford GU1 4LZ
National Highways Company Limited registered in England and Wales number 09346363
Diversion routes
The diversion routes in place are detailed below, and maps will be added to our scheme
webpage.
A3 northbound carriageway closure from M25 junction 10 to Painshill roundabout:
- The primary route will be for traffic to leave the A3 at the Send interchange, then
join the A247 southbound to Clandon crossroads, join the A246 eastbound to
Givons Grove Roundabout, join the A24 eastbound towards M25 junction 9. They
will then continue northbound on the A243 to Hook, join the A309 westbound
(Kingston Bypass) to the Scilly isles Roundabout, join the A307 southbound to
Cobham, and then continue westbound on the A245 to Painshill. - M25 Diversion: traffic will be diverted from the A3 at the M25 junction to join the
eastbound M25 to junction 9, where they will join the above route from the A243
onwards.
A3 southbound carriageway closure from Painshill roundabout M25 junction 10
- The primary route will be for traffic to leave the southbound A3 at the Hook
interchange, join the A243 southbound towards M25 junction 9, continue south on
the A24 to Givons Grove Roundabout, continue westbound on the A246 to Clandon
crossroads and then head northbound on the A247 to re-join the A3 at Send. - Diversion from Painshill roundabout for traffic wanting to join the eastbound
(anticlockwise) M25: Travel via the A245 eastbound, join the A307 northbound at
Cobham to Scilly Isles Roundabout, continue eastbound on the A309 (Kingston
Bypass) to the Hook Interchange, then join the A243 southbound to join the M25 at
junction 9. - Diversion from Painshill roundabout for traffic wanting to join the westbound
(clockwise) M25: Travel via the A245 westbound through Byfleet, join the A320 at
Six Crossroads Roundabout to join the M25 at junction 11.
We would like to apologise for any inconvenience these closures may cause you. As
further closure dates are confirmed we will roll out the information using the scheme
Registered office Bridge House, 1 Walnut Tree Close, Guildford GU1 4LZ
National Highways Company Limited registered in England and Wales number 09346363
website, which will function as the primary source of information.
For the most up to date
information about the M25 junction 10/A3 interchange project, please visit website.
www.nationalhighways.co.uk/m25j10
Please plan and allow extra time for your journey: www.nationalhighways.co.uk/travel-
updates.