Never has London been faced with such an important choice. With only five days left before Election Day on May 1 all the main candidates are on the stump trying to drum up as much last minute support as they can.

Boris Johnson of all the candidates has begun campaigning early Saturday morning at Billingsgate Market to speak with traders, along with the party's leader David Cameron. The strategy of the Conservative Party is to focus on crime and the way in which incumbent Ken Livingstone has failed to address the rise, despite official figures claiming a drop, and the responsibility of the Mayor to implement solutions that work.

The key now is for Boris to make a deal with Brian Paddick on second choice votes. Paddick yesterday refused to address the issue by saying he will not be endorsing any of the main candidates as second choice preferences, but would be inclined to vote Green. This leaves candidates like Boris in the unenviable task of having to win enough first choice votes to not have to depend on the second votes.

Today's Guardian has shown Ken slightly ahead of Boris, "The survey conducted by Ipsos Mori puts Livingstone on 53% - six points ahead of Johnson on 47% - among those certain to vote in next Thursday's election, once crucial second preferences are taken into account. It is Livingstone's biggest lead since the campaign started."

The Guardian immediately undermined its own claim in the next paragraph by saying "However, the study for Unison, the trade union, found that some of those who said they were certain to vote had not registered. Once that was factored in, Livingstone's lead shrunk to 4%."

This contradicts the latest YouGov poll which shows Boris ahead by five points, and Paddick again struggling to break through with fewer than fifteen per cent of the vote.

The priority now for Boris is to mobilise his core vote, and the Labour Party fails to get its support out for Ken. The election will be the closest in history with the winner who ever it may be, will have City Hall waiting and all the perks in the horizon, and of course the 2012 Olympics games.