This BBC Radio 4 documentary is excellent – official blurb below – http://www.bbc.co.uk/programmes/b08k15lh
Will Self walks the London green belt in search of the 1947 Town and Country Planning Act which optimistically tried to end the post-war British conflict between field and city. He retraces a countryside ramble he took with his father, the journalist, town planner and political scientist Peter Self – a leading exponent of the principles enshrined in the ’47 Act. Will argues that the public consensus to build a New Jerusalem has been squandered in the past seventy years, leading to the present day housing crisis. He goes back to first principles and argues that the offer made in 1947 by the Minister of Town and Country Planning, Lewis Silkin to build a better Britain is as relevant today as it was then. Will says that if it was an opportunity missed, then the fault doesn’t lie exclusively with the planning system, rather with our lack of desire to make the planning system work.