Big Janner
MB Enthusiast
Sounds intriguing, I'm trying to work out a better route than the M25 around London.
Well the time you are going to be at the M25 traffic will not be a problem,it has to be the best way,then A12 to Ipswich then A14,watch out for the Orwell Bridge it is 60mph and those cameras work then A12 again.
Best route is M25N
At midnight, the traffic is light
Then, as zipdip suggests
M25S sounds Ok, but, the Darford bottleneck only needs a minor hiccup and you're screwed