Zac Goldsmith, Conservative hopeful for City Hall, floundered in a trivia quiz on London, with just over a month to go before the 5 May election. Goldsmith embarrassingly failed to give the correct answers to the majority of Norman Smith's questions, as the top BBC journalist drove the Tory around the capital in a black cab.
Goldsmith revealed he didn't know where the Museum of London is located (close to the Barbican Centre), which football team played at Loftus Road (Queens Park Rangers) and the name of the Underground station on the Central Line past Tottenham Court Road if you travelled eastwards (Holborn).
"I'm going to stop you there: most people have a route or two routes and they become like an extension of the body," the Richmond Park MP protested. "But for me when it's outside the norm you have apps like Citymapper which you rely on every day."
Goldsmith's saving grace was his surprise knowledge of the BBC's London based so-opera EastEnders. The Mayor of London candidate correctly guessed that the villainous 'Dirty' Den Watts was the first landlord of the Queen Vic' pub.
The lacklustre performance will likely do nothing for the Old Etonian's 'man of the people' credentials. But Goldsmith's main rival for the top job in City Hall, Labour's Sadiq Khan, told IBTimes UK he doesn't want the election to be a referendum on social class.
"None of us are responsible for our background. The reason why I talk about my background is because that's what motivates me, and I feel very strongly about today's Londoners missing out on the chances that we had," the son of a bus driver turned Tooting MP argued.
"It's not Zac Goldsmith's fault who is family is, nor is it my fault who my family are. It should be a campaign based on policies, based on who's got a vision for addressing the issues we have."
A poll from Opinium, of more than 1,000 people between 30 March and 3 April, put Khan eight points ahead of Goldsmith in the second round of voting (54% versus 46%).