Colourful mayor of London Boris Johnson is felt by many in Tory leader David Cameron's inner circle to be an accident waiting to happen which, if it did, would provoke mixed feelings in the Tory leader as Boris clearly sees himself as leader-in-waiting. Now Boris is in the soup for telling oleaginous chairman of the Parliamentary home affairs committee Keith Vaz to eff off in a released transcript of a conversation between the two. Well actually he told him ten times. Vaz of course can be, and usually is, very annoying but on this occasion he had a point, upbraiding Johnson for giving inaccurate evidence to the committee about the exact time he discussed the arrest of Tory immigration spokesman Damian Green with Cameron. This matters because Boris was told first. In reply, between the expletives, Boris confessed that he wasn't a detail man. You can say that again. Boris will get away with it this time but we await eagerly former Met commissioner Sir Ian Blair's account of his interview with the mayor when he was asked to resign. If Boris turns out to have told Blair what an effing useless copper he was (an opinion held by many it must be said) then Boris, as the self-imposed chairman of the Metropolitan Police Authority really will be in the soup. Tory members, and indeed London voters, may take the view that boyish charm and bicycle clips only get you so far.