Im travelling to Kent, from Lancs, and have 2 options.

M6, then M40 past Oxford, then down past Heathrow and the bottom of the M25

Or: M6, down the M1, then around the top of the M25 .

Route finder etc is telling me it is pretty much identical miles wise, either route.

What I dont know is where Im most likely to get snarled up in traffic, getting round London

Hitting the M25 around lunchtime, on a Saturday.

any experienced M25ers here, able to give some local knowledge to me.

Thanks