Julian Haines descending B-11 (first explored 1976) to investigate in 1994. This blind 55m shaft is invisible from more than 5m away in most directions, but has a most promising sound of water in wet weather, and an impressive rattle of rocks thrown down. It was finally fixed by surface survey in 1997 and given an "official" number (1623/198) in 1998.
Photo © Andy Atkinson, 1994