David Dimbleby chairs the debate in London, with a panel including Transport Secretary Lord Adonis, London Mayor Boris Johnson, Liberal Democrat peer Shirley Williams, broadcaster Carol Vorderman and novelist Will Self.
David Dimbleby
Self - Chair
Andrew Adonis
Himself - Panellist
Carol Vorderman
Herself - Panellist
Shirley Williams
Self - Panellist
Will Self
Boris Johnson