Balcony - Cathedral Chasm
Went down to limit of exploration. David rigged a couple of 10m pitches but both were choked. Walls covered with some nice "flapjack" crystalline calcite. Meanwhile Mark and Ashley explored a B/C lead. A couple of dead bats. After about 50m it began to get lower, but a flat-out crawl popped out into a big, obviously well used passage! It turned out to be right next to Trident Junction. We finished off by detackling the upper way into Cathedral Chasm. Any further pushing can be more conveniently done via the crawl, rather than going all the way round, which includes a slightly dodgy pitch and a couple of traverses.