Have you tried searching this forum for the term gloryhole? There have already been multiple threads with links to gloryhole information around the world.
Besides, isn't the UK rather big to be looking for a gloryhole anywhere within it?
This is LIT-erotica where the size of your polysyllable matters. --VelvetDarkness
Come to think of it she's kinda like Mary Poppins. Practically perfect in every way. --graceanne
Etoile you are all kinds of the best --Lord_Steve