Anti-urban 4x4 campaigner Siān Berry is clear on her goal to make London more environmentally friendly and affordable for its residents as the Green Party candidate for this year's elections.
The former Met police officer, Brian Paddick is the Liberal Democrat candidate for the London Mayoral election in 2008 and has set cutting crime and the fear of crime very much at the top of his agenda.
Never far from controversy or short of words, Labour's candidate Ken Livingstone finds himself running for third consecutive term as mayor of the Capital.
Matt O'Connor is the founder of the fathers' rights group Fathers 4 Justice and was selected by the English Democrats as the their candidate for the May elections.