Another trip down to sump 2 to chemically pursued the calcite blockage above the streamway. 4 slabs were put in connected by cortex. This resulted in a lot of rock being blown out the tube. A return will be made to see what affect it had.
Standard tourist trip with Cardiff freshers.
A trip down to mazeways entrance pool to collect 3 CDG 6Ltr cylinders that are out of test and rusting internally. The lakes were particularly cold in fleeces, as was swimming across the Green Canal. After getting to mazeways we collected the cylinders and completed the roundtrip back to the long crawl. The way out from here went very smoothly, cylinders really are quite easy to manage in the long crawl. A very productive trip if not slightly cold at times.