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In five weeks’ time, Boris Johnson's eight-year term as Mayor of London ends, leaving one of the most powerful jobs in the country up for grabs.

So who's going to fill his shoes? If the opinion polls are right, it's a straight fight between Conservative candidate Zac Goldsmith and Labour candidate Sadiq Khan.

Currently it's Mr Khan, the MP for Tooting, who the bookmakers are tipping to win. So if he did, what kind of Mayor would he be?

Our political guru Norman Smith shared a cab with him to find out.