Thanks for the report back vantage.
I'd always be wary of using any place posted on a forum/the open web.
Is it possible that the post on that forum was mischievous?
Things you discover on a bike.
I can offer you a mediterranian EU funded gay dogging spot I encountered in some aimless wandering on a day ride, or, more usefully maybe, if you should PM me:
A grass verge near a Norfolk dual carriageway
Another sliver of grass on a useful kinda dead end Norfolk Road
Wood near Brighton where you can fall asleep to the sound of gunshots.
New Forest Spot
Heath near the new forest.
All those I bivvied in apart from the dead end sliver where I had the luxury of a tent.