As Pete says, it is a job for a group to bail as although the low point is narrow, water backs up into quite a wide passage so it takes quite a bit of work to lower the levels initially. As its now not muddy, I did wonder if it would be worth building a man powered pump to increase efficiency...

There is more than one entrance to Sally's and at least one of the less obvious ones has been used as a latrine, probably by boulderers caught short in the wood. If you find that first, don't feel you have to squeeze over it. Look to the south to find a short scramble up to the most commonly...

I like to get this information from gaugemap.co.uk. It gives access to some additional gauging stations and allows you to look at different time periods, up to the last year. Not as east to download the raw data though. Doubtless it draws the information from the same EA database.

My experience of hydraulic coring and borehole drilling equipment is that you get significant power losses through additional lengths of hydraulic hose as compared to compressed air. I've not used a a hydraulic hammer drill but you may need to be closer than you think to the power pack to...

Hi all, I know this has been covered in the past, but I can't see any recent threads in the past 5 years or so.  Looking at old threads I see that Aviva were offering cover for low intensity UK type caving on a standard policy, at least those arranged through Summit FS.  However they've just...