Drivers are being directed to follow a Hollow Square symbol on road signs for the diversion.

The route is as follows:

Exit the M25 at J10 (Wisley Interchange) at the roundabout take the 1st exit onto A3 towards London.
Follow the A3 to Tolworth
Take the exit slip at A240 Tolworth Interchange and take the 3rd exit at the roundabout onto the A240 towards Reigate.
Continue onto A24 at Organ junction
At A24 Ewell By-pass roundabout, take the 1st exit onto the A240 towards Reigate.
At A240/A217 Burg Heath junction, turn right at the traffic signals onto the A217 towards Reigate
Follow the A217 to M25
At M25 J8 (Reigate Hill Interchange) take the 1st exit and re-join the M25 at J8.

National Highways warned drivers to allow extra journey time, plan ahead, or re-route.