Things haven't been that great at Teesside operationally these last couple of weeks and this is another example. We have the low loads on Belfast, we have Spanair's opening weekend wrecked by massive delays and now a scheduled lo-co service cancelled without reason.
Sure these things happen, but Teesside is only small so you notice these things more.
Would love to know the reason for this delay. Whatever you find out, you should certainly be writing to the airline IMO for some answers.