Here’s the deal: National Highways is closing a chunk of the M25 near Junction 3 (the A3 interchange) from Friday night until Monday morning. Think of it as the road going on a little spa weekend—except instead of cucumber water, it’s getting fresh tarmac and white lines.
This is the second closure in a massive £317 million upgrade to the junction. Yes, you read that right—£317 million. That’s enough to buy every person in Surrey a slightly fancy sandwich, but instead, they’re fixing our traffic. Priorities, people!
The closure runs from 10pm on Friday 14 March to 6am on Monday 17 March 2026. So if you were planning a romantic drive around the M25 at midnight on Saturday… maybe reschedule that date.
Where Exactly Is the Map?
Right, let’s talk about the map—because I know you’re scrolling on your phone right now, squinting at little blue lines. The closure affects both carriageways of the M25 between Junction 10 (A3 Wisley Interchange) and Junction 11 (A320 St Peter’s Way).
I know, it sounds like a secret code from a spy movie. But in plain English: if you’re driving between Wisley and Chertsey, you’re in the danger zone. The actual closed section is about nine miles long, but the knock-on effects are bigger than your auntie’s handbag at a wedding.
National Highways has released an official “diversion route map” that looks like a toddler’s drawing of spaghetti. But don’t panic—I’ve decoded it for you.
