Coniston Copper Mines, not actually OH
Birks Bridge at base of Harter Fell in Duddon Valley, v clear waterfall and swim through.
Devils Bridge, best at dusk when the eels appear.
The 3-4 quarries around Dorothea.
Blue Lagoon in Snowdonia.
There's another quarry further south in Derbyshire Dales, will see if I can recall name.
Most/Some are trespass sites mind.
Middle Peak Quarry. If you search The Doveys on u tube might give u some targets.
You can dive Hodge from the top car park. We did it once. There’s a reasonable path down the spoil heap to the south of the car park which ends up at the start of the long tunnel. It’s hard work. Easier to take your sets down first in wellies.
I’ve helped some folks from High Wycombe SAC dive Red Tarn at Helveyln. The walk in to that made Hodge feel like the top car park at Stoney.
Thanks for the Hodge info - long time since I was there!
There is a Hodge FB page with more detail and access to discuss with current owners.
He asks for an MR donation to the team of your choice
Mark Ellyatt's inspired training site has quite a lot of detail. It's a bit of a ballache access to the shafts is via a 300m(?) tunnel (dry) at the end of this there are 2 shafts from memory.
Left is OH, right though is a deep vertical shaft so prvoided you don't wander into the actual adits off the shaft direct surface access is possible.
Plenty of potential hazards though in terms of rotting mine debris etc.
I dived it in the 90s so memory is a bit sketchy on full detail.