Tristram Hunt tells the story of architectural change in Britain over 60 years, tracing the country's changing idea of itself through three controversial public building projects. In 1948, Peterlee was the future, an exciting New Town planned by architect Berthold Lubetkin for the Durham miners he idolised. Tristram asks why Lubetkin, most famous for London Zoo's Penguin Pool, left Peterlee before a single house was built. As he looks back at Peterlee's troubled birth, Tristram dissects the furious debates which Lubetkin's failure sparked, and which marked the beginning of Britain's post-war architecture wars.