If you need to know how properly posh you are there’s a very simple test: are you pro- or anti-Brexit?

Until the European referendum campaign got going, I thought it was a no–brainer which side all smart friends would take. They’d be for ‘out’, obviously, for a number of reasons: healthy suspicion of foreigners, ingrained national pride, unwillingness to be ruled by Germans having so recently won family DSOs defeating them, and so on.