adoucette, here is a link that might help you out. http://www.wanderlust.co.uk/magazine/ar ... s?page=all
This article mentions some British Cavers who might could help you out. As stated in the article, "I’d been to the area before, and had met Howard and Deb Limbert, members of the British Cave Research Association."
Perhaps if you do a bit of Research online, you can possibly find Howard and Deb Limbert online by searching British Cave Research Association, or Howard and Deb Lambert. Maybe they can give you some tips. Good luck with your trip. They might even be
NSS members. I did not check to find out.