Get of at nine (or ten if you have passed it) from 9 go Oxshott a3 one junction south then weybridge and back on M25 at J 11.
from 10 go one jn north on A£ , head through Weybridge and out onto J11.
good luck,
Should've stayed at home mate, all those moromic "bargain hunters" will be blocking the roads today looking to buy something cheap they didn't want anyway.