Conservative incumbent Boris Johnson
Labour candidate Ken Livingstone
Liberal Democrat candidate Brian Paddick
Green candidate Jenny Jones
Credits: All dog pictures taken from Flickr, under a creative commons licence. ‘Boris’ played by Einstein, courtesy of Mark A. Scholl. ‘Ken’ played by Taun Taun, courtesy of Ranabass. ‘Brian’ courtesy of Darwin Bell. ‘Jenny’ played by Stella, courtesy of JeremyMcWilliams. All human mayoral candidates played by themselves: photo of Boris from the BackBoris2012 campaign / Andrew Parsons / i-images, photo of Ken from the World Economic Forum, photo of Brian from the Brian Paddick Flickr pool, photo of Jenny is from the London Assembly.
The BNP has denied reports that its candidate Carlos Cortiglia is a Chihuahua.