With my thicky woman hat on - is this likely to be the same leak that is taking a while being washed through to this part of the cave because the lower than average rainfall over the last year?
We seem to have two threads for an identical thread,
perhaps the mods could magic them together.
I have reread the previous thread linked by Les and the sense of it would seem to be
two leaks emanating from an identical source, I await correction.