Protection, prevention, detection, detention   There's nowhere to defect to anymore   Protection, prevention, detection, detention   There's nowhere to defect to anymore      I'm building a wall, a fine wall   Not so much to keep you out, more to keep me in   I'm building a wall, a fine wall   Not so much to keep you out, more to keep me in      Back then on a bomb site we were spies among the ruins   Such precocious barbarians, on TV we saw cold war      Protection, prevention, detection, detention   There's nowhere to defect to anymore   Protection, prevention, detection, detention   There's nowhere to defect to anymore      I'm leaving the world, it's all wrong   Not so much what men are doing much more what they're not   I'm building a wall, a fine wall   Not so much to keep you out, more to keep me in      Jesus and The Man from U.N.C.L.E.   Caesar conquered Gaul scouting for centurions on a Roman wall      Through the woods, the trees and further on the sea   We lived in the shadow of the war   Sand in the sandwiches wasps in the tea, it was a free country   Who do you think you are, Captain Britain?      I'm building a wall, a fine wall   Not so much to keep you out, more to keep me in   I'm losing my head, well why not?   More wood for the undertaker means there's less for me      I'm building a wall, a fine wall   Not so much to keep you out, more to keep me in   I'm building a wall, a fine wall   Not so much to keep you out, more to keep me in      I'm building a wall, a fine wall   Not so much to keep you out, more to keep me in