Mike and I clambered over the 21 bags left from last time. Mike plug and feathered the big boulder left from last time. I filled bags and shuttled rocks back along the passage. 14 more bags filled. Mike got out the second huge boulder and started demolition when we realised that we had 35 bags and a load of rocks in the cave. All 35 bags removed and tipped plus 5 loads rocks. So 40 loads came out. The tower got a bit higher. The cave all cleared out and the big boulder to be demolished next time .Now 5.5m along that bit. 4m to the upright pole.The end now almost resembling a chamber.
You get rid of one rock and then another comes along.