New poster depicts Boris as a martian as the Mayor extends his poll lead to four points.
Our leader on Livingstone's flaws.
The London mayoral election isn't over.
Labour peer declares that "Livingstone must NOT get in".
Livingstone's team deny claims and say the voters were "street cast".
Latest mayoral poll puts Boris six points ahead.
The London mayoral candidates publish their tax returns.
"You're a fucking liar," Johnson tells Livingstone after exchange on tax avoidance.
You can’t run against Boris as the banker-bashing candidate but avoid your own income tax.