As Tory MPs nickname their new Chief Whip “Fifty Shades”, backbenchers have been speculating whether Andrew Mitchell would be taking his Special Adviser Philipa Buckley over from the Department for International Development. Mitchell and Buckley are said to have developed a strong professional relationship, greatly aided no doubt by the extensive international travel required in his previous brief. Since the reshuffle Buckley has apparently been introducing herself as Special Adviser to the Chief Whip, but caveating that she doesn’t think she will be staying long. Why might that be then?