First post here but hope to be a regular contributor this forum. My friend and I live very near to Duffield Bank Railway and when exploring a public footpath next to Edgehill House in order to spot any signs of the railway (a bridge or clearing), we came across a quarry/pit with a railway tunnel cut into the rock. It was not lined with brick or masonry. I returned home to read up on my Heywood book, but found that Edgehill Station was named after a property south of the line. I then realised that Tennis Ground Station was on the other side of the tunnel, and we were observing from the south of the loop.
Anyway, I am very confused as to which tunnel this is, as the Southern Tunnel is brick lined and goes in a complete loop while this quarry tunnel was straight. I am also told that there was a tunnel in-between Tennis Ground and the Southern Tunnel, but was removed circa 1881.
Could anyone please clarify whereabouts this quarry tunnel is on the line and what is on the other side. I’ve attached some photos. Any help would be greatly appreciated.