I hope for your sake you aren't flying with BMI. I had flights booked with them to Jersey 29th October to 1st November.
Last week I received an e-mail telling me that my return flight had been put back 4 hours. No great problem, I thought, so let it go. Two days ago, I checked my inbox to find two more e-mails from BMI. The first was to inform me that my outward flight had had to be put back 24 hours to 30th October. The second e-mail was to tell me that the flight was now going from a different airport (East Midlands instead of Birmingham). Enough was enough, and I phoned them and asked for a FULL REFUND (which I have received). I have re-booked with good old Easyjet.
Good luck.