This is Sowerby, a mile north of Inskip, which is a few miles east of Blackpool. Note how it blends into the landscape due to the seventy years of weathering. this was an inland stop line of some description, had the enemy penetrated the coastal defences. The gun emplacement was filled with sand in the 1980's to enable a JCB diggr to use the gunsite as a solid base for working on the drainage ditch, clearing it of crap, etc.