I have driven from SE22 to Guildford for over 10 years as my job is based there. I agree that there is no easy way. However having tried everything I finally went for A3 then off at Shannon Corner into Wimbledon Tooting Balham and then around South Circular via Tulse Hill.Not a good way in middle of day as lots of High Streets. I tended to drive down earl;y and come back early evening.There is a way you can turn right after Colliers Wood and go around Tooting Bec.