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?"
Nothing undeground, but ironstone at 14 mins & jet / alum from 26:
https://www.my5.tv/kate-humble-s-coastal-britain/season-1/episode-5-856fc087-6221-40c4-b553-8e0e852bdad6
Was also mentioned in:
https://ukcaving.com/board/index.php?topic=25813.0
