Last month – in those seemingly distant days when David Cameron was Prime Minister, when ‎Boris Johnson and Michael Gove shared a battle bus and when Theresa May was in hiding – the then Tory leader was of the view that of the potential contenders to succeed him, at some date assumed to be several years down the line, the only two of his colleagues who could do the job of Prime Minister were “George or Theresa.” George Osborne having been blown up by his incredible warnings in the referendum, that left Theresa May.