Great Douk Cave, Yorkshire Dales Caving

Great Douk Cave is a shallow cave system on the western slope of Ingleborough in the Yorkshire Dales. It is popular with beginners and escorted groups, as it offers straightforward caving, and it is possible to follow the cave from where a stream emerges at a small waterfall to a second entrance close to where it sinks 549 m further up the hill. Geologists believe that the cave is almost half a million year's old.
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Does this cave totally flood to the roof during wet weather