Those travelling on the M25 clockwise should follow this diversion:
At M25 Junction 5 follow onto A21 and then take the second A25 exit towards Westerham.
Follow A25 through Sundridge, Brasted, Westerham, Limpsfield and Oxted.
Continue along A25 towards Godstone to A25 / A22 roundabout.
Take 3rd exit onto A22 towards London to M25 Junction 6 “Godstone Interchange” and take 2nd exit and rejoin M25 towards Gatwick.
Those heading anti-clockwise should follow this diversion:
Exit the M25 at J6 then at the Godstone Interchange take the 3rd exit onto the A22 towards East Grinstead.
At the A22/A25 roundabout take the 1st exit onto the A25 towards Westerham.
Follow the A25 through Limpsfield, Oxted, Westerham, Brasted and Sundridge.
At the traffic signal junction A25/M25 turn left to re-join the M25 towards Dartford Crossing.