Trafalgar Square fourth plinth: the contenders

Artist Hew Locke poses with a model of his proposed fourth plinth design, entitled Sikandar Photograph: Oli Scarff/Getty Images

Locke's proposal is a postmodern take on the equestrian statue of Field Marshal Sir George White (1835-1912) that stands in London's Portland Place Photograph: James O Jenkins/PA

German artist Mariele Neudecker's design, It's Never Too Late and You Can't Go Back, is a fictional mountainscape sculpture that when viewed from above reveals the flipped and reversed shape of the British Isles Photograph: James O Jenkins/PA

Brian Griffiths, with his proposal, Battenberg
Photograph: Oli Scarff/Getty Images

Griffiths's piece is a large sculpture of the famous cake made from a unique collection of glazed and unglazed Victorian, Edwardian and contemporary bricks from around the UK Photograph: James O Jenkins/PA

Michael Elmgreen and Ingar Dragset's Powerless Structures, Fig 101 Photograph: Nils Jorgensen / Rex Features

Elmgreen & Dragset's work, a brass sculpture, counters the tradition for monuments that celebrate the heroism of the powerful Photograph: James O Jenkins/PA

Artist Katharina Fritsch with her proposal, Hahn/Cock Photograph: Oli Scarff/Getty Images

Jennifer Allora and Guillermo Calzadilla's piece, Untitled (ATM/Organ), is a working cash machine connected to a functioning pipe organ, which produces different sounds depending on the action the customer is performing
Photograph: James O Jenkins/PA