For Blackburn a win could secure 6th place, providing Aston Villa don't win at West Ham.
Blackburn winning though will send Birmingham City straight back into the Championship after just one season in the top flight. Even a draw is unlikely to be enough to save Birmingham who would need two other results to go hugely in their favour including Fulham losing by 5 goals at Pompey and Reading losing at Derby.
Whatever happens there will be some tears from the home crowd whichever way it goes.