Sid - you can see the point John's making. Difference in a twin is that you can join direct Ally Pally to Vauxhaul bridge if you want a quick in/out, routing in/out from the north in a single was just about doable up the Lee valley, but no more. Fwiw John - not too much of a detour to route thames barrier, LCY overhead, becton, north circular to M11J4. There are clear areas but keep your eyes on the power lines... Certainly shorter than routing far east out of the zone
