Yet another example of the durability of concrete. Concrete blocks designed to stop an army invading Britain are now being used to combat erosion on an east Norfolk beach. "The people of Hemsby, who are campaigning and raising funds for DIY coastal erosion defences, have been given permission to move the huge anti-tank defences in a bid to hold back the biting tide. The anti-tank defences have been on Hemsby beach for 60 years, installed during the second world war when Norfolk’s coastline was vulnerable to invasion."