English: Anti-tank defensive concrete blocks. Mass concrete cubes about 1.4 metre high in their original location on Limpert Bay Beach, West Aberthaw to defend against possible invasion in WW II. Note the "sharp" edges of the cubes face the sea and there is a gap of about 1 metre between adjacent blocks. Since the war, some of the blocks along the defensive line have been moved to provide a contiguous line (as a protection against beach shingle encroaching on farm land) near to the Aberthaw power station (which can be seen in the background to this photograph).