Ladder is fine. Water was about 7 degrees at the bottom and 6 in Chamber 3. We also dived the "sump" (the 5M deep bit with an air pocket). Tunnel was knee deep near the entrance but about a foot deep through the rest.
Viz was 7-8M (i would say) but got better at depth to maybe 15m at a stretch. Tunnel had lots of particles but some others had been through it too.
Will be going back soon. That was about 3 weeks ago.