Recently there was long thread about the BCA. I can now post possible answers to some of the questions, such as "Why is the BCA still raising membership prices when there is a significant amount still left in its coffers?"
Just for a pendant.
Martel was the first to bottom the main shaft, but not the first to descend the main shaft. John Birbeck descended to what we now call Birbeck's Ledge.
The article doesn't mention anything about caving clubs either.