Graham S has it. (Sorry for late reply; been out digging.)
Notice how white the floor is. It's porcellanous bed, we think the same one seen so clearly in GG main Chamber. Much of Midge Hole and some of Hurtle Pot & Jingle Pot are formed on it.
(Good call though Langcliffe; it could have been!)
To narrow it down - this one is in South Cumbia at the base of a lot of limestone. It has an OS map name and a separate Northern Caves name. The all-weather resurgence below the cave is a water supply. I'll give it away in the next couple of days if no answer.
Oh, go on then. It's Pool Bank Cave (Fairies Hole) near Witheslack, photographed in wet conditions when the water level backs up some 6 m and pours out from the (fault guided) entrance ravine.