The Surrey stretch of the M25 is set to close for one last weekend from this Friday as part of the ongoing junction 10 improvement project.
Once again, the closure is necessary for bridge demolition – and National Highways is urging drivers to think carefully about travel plans after warning the last full closure (7-10 March) led to more traffic on the official diversion than on similar closures last year.
Drivers travelling around Surrey between 21 and 24 March are warned to only use the motorway and surrounding roads if the journey is absolutely necessary – and to allow extra time and use alternative routes where possible.
National Highways has also stressed that drivers should follow official diversions, not information from sat-navs.
The local diversion route is the same for both directions. Drivers going clockwise will be diverted from the M25 at junction 10 to join the A3 northbound, before taking the A245 at Painshill and then the A320 before rejoining the M25 at junction 11.
Anticlockwise, drivers will be diverted from the M25 at junction 11 to join the A320 southound, before taking the A245 to Painshill and then heading on the A3 southbound to rejoin the M25 at junction 10.
Avoiding the closure by taking the M25 via the Dartford Crossing may also be quicker.
RAC Breakdown spokesperson Alice Simpson said the M25 closure could present a ‘red card’ for England fans heading home from the match at Wembley Stadium on Friday night.
“With junctions 10 to 11 shutting at 9pm, just before the sold-out England game finishes, heavy congestion is almost inevitable for those travelling back to Sussex and Surrey. We encourage football fans to seek alternative routes where possible or use public transport to minimise queuing in traffic,” she said.
“The same advice applies to anyone using the M25 to visit London for the weekend or holidaymakers heading to Gatwick and Heathrow, both of which are easier to travel to by car. It’s absolutely essential that drivers follow the official diversion routes, rather than relying solely on their sat-navs, to avoid being led off-course.”
It’s the last full weekend closure for the junction 10 improvement scheme. Now due to open spring 2026, the project will increase the number of lanes to make journeys safer and improve traffic flow.
Latest M25 junction 10 closure updates and diversion details are available on the National Highways website.
