London is in crisis. It no longer has a cohesive sense of identity, its infrastructure has drastically declined and, most crucially, it has a totally fragmented planning policy. It is dirty, overcrowded, increasingly polarized between rich and poor, North and South. The condition of London reflects a larger crisis, affecting all our cities - that of how we live our lives and use our resources. Other European cities, such as Paris, Barcelona and Frankfurt, have similar problems but are tackling them more vigorously and imaginatively. Richard Rogers, architect of the Pompidou Centre in Paris and the Lloyds building in London, and Mark Fisher, Shadow Minister for the Arts and Media, present their arguments for the rebirth of London - one that involves architecture, planning and the development of London's under-used resources, such as its river.