TOWER BLOCKS. FLYOVERS. STREETS IN THE SKY. ONCE, THIS WAS THE FUTURE. Was Britain's postwar rebuilding the height of midcentury chic or the concrete embodiment of Crap Towns? John Grindrod decided to find out how blitzed, slum-ridden and crumbling 'austerity Britain' became, in a few short years, a space-age world of concrete, steel and glass. On his journey he visits the sleepy Norfolk birthplac...