Not a clue where this has come from although I have seen comments suggesting it is a derby. I can only guess that it is because it is two of the smaller clubs who have suffered poor ownership, overcome, and now the results are so very close every time we play. I think this is new rather than old, but really cannot see how it is described as local.
and because we have no realistic local derbies for now. The London teams are really not in our "league" - Spurs, Arsenal, Chelsea - nor West Ham really. Perhaps QPR and Fulham may qualify - certainly QPR. But we all know the only team we always want to see lose are the bunch from up the M1.