The following GPX file uses data from HNH/PeakDistrictCaving, specifically their index to the Bradwell Catchment (PDF).
I created this after a trip around Bradwell Dale, mostly looking at the geology, and compared with a set of GPS waypoints and the tracklog. Based on this, I am sceptical of the accuracy of the Grid Ref for Bradwell Parish Cave. I would place this at SK17255 80605.