Rob, I don't think the Peak's caves are really on Graham's patch; he wouldn't be expected to know them as well as, say, Mendip caves, or caves in certain parts of France. But I think he was making a general point about the term I used. Knowing Graham he's probably right!
In the context of digging speak, you've obviously cottoned on to what I meant.
I still think Cliffhanger would be the best place of all for exploratory effort, if that damn sump could be dealt with. Massive passage, on a prominent vein, booming westwards, progress only being stopped by what's probably a localised sediment blockage. If I wasn't so busy with umpteen projects in the Dales I'd be trying to get a team enthused a team and get the Cliffhanger job going. It'd be a perfect credit crunch expedition type project - providing a real focus for a massive effort of the sort that's not possible when relying on just weekends here and there. There's so much to find in that direction!