LT Rehabilitation London Underground WWII Anti Blast WallsRare original vintage poster issued by London Underground "Rehabilitation For the protection of passengers 137 anti blast walls were placed at the entrances to 75 stations. These walls are being demolished as quickly as possible but It Takes Time" one of a series published after the end of World War Two by London Transport across the London train, tram, bus and underground networks. Great artwork by Fred Taylor (1875 1963) showing workers demolishing