In a move affecting millions, the M25 is set to have its first-ever planned full closure in the daytime – with drivers being warned to only travel if necessary. National Highways will shut the M25 in both directions between junctions 10 (A3 Wisley) and 11 (A320 Chertsey Interchange) from 9pm on Friday, March 15, to 6am on Monday, March 18, to demolish the Clearmount bridleway bridge and install a very large gantry. Other areas of the M25 and surrounding motorways will also feel the impact of closure with heavy congestion expected across the home counties. People travelling to Gatwick and Heath…