London mayoral election 2016: The nastiest moments of a controversial contest

The Conservative candidate Zac Goldsmith has been accused of negative campaigning

Londoners will vote to choose the new Mayor of London on Thursday and it will bring an end to a contest that has been riddled with accusations of racism.

The Conservative candidate Zac Goldsmith has been accused of running a negative campaign, employing dog-whistling tactics against the Labour frontrunner Sadiq Khan.

David Cameron and Jeremy Corbyn clashed over the mayoral election in this week’s PMQs session.

The Labour leader accused the Conservatives of running a smear campaign against Mr Khan with their continual reference to the Labour candidate sharing a platform with Suliman Gani, a London imam who Cameron insists is a supporter of Isis.

Mr Gani has denied the allegations he supports Isis and said he was surprised by the Prime Minister's comments.

In a statement, he writes: “For the avoidance of any doubt, I state again that Islamic State is in no way compatible with my beliefs. I condemn IS wholeheartedly, and have done so repeatedly in public and in private since its inception.”

It has been revealed that Mr Gani is in fact a Conservative voter and previously been invited to an event encouraging more Muslims to be Tory councillors.

Mr Corbyn told the Prime Minister: “The gentleman concerned is actually a Conservative, so maybe he would care to think about that.

“He might also consider that Shazia Awan, a former Conservative Parliamentary candidate, said this of the Tory mayoral campaign: ‘I’ll be voting Labour. A life-long Tory voter and ex-candidate, I’m ashamed of the repulsive campaign of hate.’”