Cave diver with line reel in sump underwater passage Wales UK Stock Photo - Alamy

British cave diver Martyn Farr to join a team attempting a record for the longest ever cave penetration

Caver and sump hi-res stock photography and images - Alamy

Diver in bubble cave in hi-res stock photography and images - Alamy

Cave spelunker water wales hi-res stock photography and images - Alamy

Cave Diving British Style (an essay) - Cave Diving Group

Lights underwater diver hi-res stock photography and images - Page 2 - Alamy

Caver swimming in deep water in cave Wales UK Stock Photo - Alamy

Cave spelunker water wales hi-res stock photography and images - Alamy

Cave wales uk hi-res stock photography and images - Page 11 - Alamy

Sump cave hi-res stock photography and images - Alamy

Cave spelunker water wales hi-res stock photography and images - Alamy