Part of Ynyslas Nature Reserve Rocket Range (nprn 408392). An anti-tank pimple and one anti-tank cylinder recorded by volunteers undertaking the Defence of Britain project. Located by the entrance to a layby, they are not in original situ, and the anti-tank cylinder has since been removed. The anti-tank pimple is a freestanding concrete block with a protruding steel bolt in the top surface . This pimple would have been linke to at least one other with a length of chain to serve as an improvised road block.

Maritime Officer, RCAHMW, January 2010.