Chief whip Andrew Mitchell's political career left hanging in the balance
Chief Whip Andrew Mitchell's political career is hanging in the balance as he faces calls to quit after being accused of calling No 10 police officers ``plebs''.
Britain's top civil servant believes Andrew Mitchell, the former chief whip unseated by the ``plebgate'' row, could have been the victim of a ``gigantic conspiracy'' involving members of the diplomatic protection group that guards Downing Street.