This maybe of interest or not, but there has always been a story handed down through the generations of a tunnel leading from the church vestry into the heart of the Tump.
Obviously the church would not have been there when the tunnel was built, but knowing the topography of the land, I was born and bred in Brinklow, there could have been an entrance tunnel to the Tump which was latter built over by the church, possibly to guard the village from whatever lies within.