By Matt Chorley, Mailonline Political Editor PUBLISHED: 02:52 EST, 5 June 2013 | UPDATED: 03:42 EST, 5 June 2013 Boris Johnson is to study Winston Churchill’s rise from political outrider to Prime Minister, in a move seen as research for his own political ambitions. The London Mayor has announced he is writing a book on the wartime PM, fuelling suspicions in Westminster that he is biding his time before bidding for the top job himself. Doing little to play down speculation about his hopes of succeeding David Cameron as Tory leader, Mr Johnson said he wanted to show how ‘one man can make all the difference’.
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Boris Johnson says he wants to highlight the 'meaning today' of one of Britain's greatest Premiers
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He claims Churchill's memory has been 'distorted' by history
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Book due to be published in autumn 2014, months before general election
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Critics say he should be concentrating on the day job
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