By far the most revealing insight of the Downing Street “plebs” affair came yesterday, when it was reported in our sister newspaper, The Independent, that in his former job, Andrew Mitchell was said to prefer “a particular coffee cup bearing the words: ‘Secretary of State for International Development’”. If true, it is surely what Westminster watchers may or may not call the “Nando’s Nugget” — the bit of a political story that politically uninterested members of the public can relate to and will therefore remember, such as David Cameron’s LOL, John Prescott’s croquet at Dorneywood, or Rebekah Brooks’s horse.