Isn't the initial meet up at the "dogging layby" for us Southern folk?
I think I found it from one of Terryvanman's descriptions without a map or postcode so it can't have been that difficult.
If you meant the pie and mash shop, a 10 second google revealed this:-
Whites Pie n mash shop, 95 High St Walton on the Naze, Essex CO14 8AA
Or in future just head for Walton on the Naze. It ain't big enough to get lost finding the pie shop.
