During the summer of 1946 over forty thousand Bntisn people took the law into their own hands and squatted property that they didn't own - initially, disused military camps, then empty hotels and blocks of flats. It was an unprecedented movement of civil disobedience, ana it presented Atlee's Labour government with its first great crisis. Mark Whitaker tells the story - with testimony from several of the squatters themselves, producer Mark Whitaker