Map shows UK's busiest motorway with new tunnel underneath airport runway. Story by Joe Coughlan, Padma Murughappun • 1d. A new map has revealed how the M25 could be rerouted due to the ...

The closures are part of a three-year improvement project for one of the UK's busiest and most dangerous motorway junctions, which is set to conclude this summer. Here is what you need to know ...