Down to and through Sump 1 to find the entrance to Black Hole series.
Obviously an excellent trip down Cuthbert's. We had a look at all the pretties then went on to sump 2. The entrance rift was fun on the way out due to the large amount of water.
After an hour on the surface winching out bags and emptying them we went down to blow up the boulder choke and fill more bags up.