Ken Livingstone is gaining ground on Boris Johnson to win London's Mayoral election in 2012, according to Ladbrokes.

With Boris seemingly unable to prevent Tube workers from striking later today, he has dropped from Evens to 11/10, whilst former Mayor Ken has seen his recent campaign activity pay off as he moves from 11/8 to 5/4.

Last week Boris Johnson's odds took a hit as it was suggested he may not even stand for re-election, and other potential candidates were thrown into the mix including his deputy Kit Malthouse (20/1) and London Olympics Chair Sebastian Coe (66/1). Labour's other potential candidate Oona King is still lagging behind Livingstone at 8/1. This is the largest price that the bookies have offered on Johnson since he was elected in 2008.

Richard Royal of Ladbrokes told Bettingpro: "Things appear to be getting a little rocky for Boris as he seems uncharacteristically uncertain over his own future and apparently unable to prevent the impending tube strike. In contrast, Ken appears to be on the front foot and gaining in confidence."

London Mayoral Election 2012 odds
Boris Johnson 11/10
Ken Livingstone 5/4
Oona King 8/1
Kit Malthouse 20/1
Vince Cable 25/1
James Cleverley 25/1
Shaun Bailey 33/1
Greg Dyke 40/1
Simon Hughes 50/1
Lembit Opik 50/1
Sarah Teather 66/1
Caroline Pidgeon 66/1
Sebastian Coe 66/1
David Laws 66/1
Brian Paddick 100/1
Sian Berry 100/1
George Galloway 100/1
Sir Ian Blair 100/1
Richard Barnes 100/1
Rchard Littlejohn 100/1
Michael Portillo 100/1
Brian Haw 200/1

Boris to run in 2012?
1/2 Yes
6/4 No

Labour Nomination
1/8 Ken
4/1 Oona