In a bad-tempered meeting at Old Trafford, United and City showed they are far from the finished product Sign up for our free newsletter here While London has a host of top-flight clubs and Liverpool have been regular contenders, the story of the Premier League can almost entirely be told with Mancunian main characters. From Manchester United’s decade-plus of dominance under Sir Alex Ferguson to Manchester City’s emergence among the oil baron class, with a grip made firmer under Pep Guardiola’s…