And behold, there was rock!
The first task of the evening was to shift the rock debris out of the way. I went ahead to drag the rock back, breaking the larger pieces with the lump hammer, and passing the rocks bac to Roz who stacked it all at the base of the rift [pot], ready to be cleared out on Saturday.
Then the next task for the evening.
While I started to drill the holes, Roz bagged some of the smaller sized gravel to add to the stack of rocks. 6no. holes plus another for the trimmings, all well stemmed, retired to a safe distance, everything sounded good.
Locked the cave and departed. There will plenty of work for the weekend.