That's right Sam - yer normal stalactites / stalagmites / flowstones etc. If they're in a sump they must have grown before the passage became flooded.
What sparked our interest was the flowstones which turned up in Keld Head down to 7.2 m depth. This means that huge lengths of the mighty Keld Head underwater system were once dry. We dated this flowstone (just under 90,000 years old, which is before the main Devensian ice advance). This means that before the last glaciation the valley floor in Kingsdale was at least 7.2 m deeper than it is today. Keld Head would have been a walk in entrance which would have provided an easy and impressive stroll for a quarter of a mile to a huge sump pool. From here the dive through to Kingsdale Master Cave would have been in the region of only 600 m to 700 m. ALL of the passages in the downstream Kingsdale Master Cave sump would have been dry as well. Much of the Marble Steps Branch would have been an open streamway. (In fact the latter contains what look like vadose features in places.)
Furthermore, just inside the entrance to Keld Head there is a rock floor at around - 4.5 m. Because the water level was well below this lip for long enough for substantial flowstones to grow, there must have been another resurgence elsewhere in Kingsdale, leaving what we know as Keld Head today completely dry. (This would have been similar to Sleets Gill Cave for example, now drained by the immature Moss Beck Head.) The reason that the water level has risen to its present level is almost certainly the terminal moraine (Raven Ray) down valley from Keld Head, which dammed up a post glacial lake - which then got filled up with sediment. The postulated alternative resurgence is now buried in the lake deposits and can't be identified (unless future exploratory work by diving reveals another relict outlet at the correct level).
If you look at the various posts on the CDG message board about this you'll find that the Kingsdale situation seems to be unique. However, just by dating one flowstone we've learned a huge amount about the glacial history of Kingsdale. This is why we're asking people to report any further sightings of underwater formations. They are of great interest!
(By the way, regular readers of Cave & Karst Science will be aware of a couple of recent papers on the above - but I thought it might be worth outlining the main points here as maybe some readers of this forum aren't familiar with this work.)