Yup, I knew that if I thought about it for more than 15 seconds I would have bottled it so I just took a deep breath and pulled myself through. Came out the other side laughing like a mad thing ;-)
It's my first visit to Mendip but won't be my last. Also got to visit GB and shatter, both stunning caves but for different reasons. Good times in the Wessex hut too. Friendly folk!