Haytime Hole, near Sell Gill Holes above Horton-in-Ribblesdale, was discovered and explored by KCC in 1978. The initial team of Mick Graham and Mike Whitelock dug out a slightly drafting shakehole, with John Cordingley and Nigel James joining once things were looking promising!
Length is around 1000ft and depth is 223ft.
Low resolution version of survey: