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Boris Johnson denies ambitions to be Prime Minister

24 March 2013 Last updated at 11:18 GMT

Boris Johnson has denied he will ever be Prime Minister, ahead of a candid BBC Two documentary about his ambitions, and said he will work to help David Cameron to win the next general election.

Speaking on The Andrew Marr Show, Johnson added "people don't care" about his past and are more concerned with the economy instead.

BBC Two - Boris Johnson- The Irresistible Rise

BBC One - The Andrew Marr Show