Matt,
flybe are currently recruiting fo's and cpts on the Q400 - whether they will still be recruiting in 18 months when you finish the integrated course, who knows? The chances are that they will be (if the past couple of years are considered). If they are, Belfast is a busy base and there would be a fairly good chance of a posting there, the turnover of pilots to other flybe bases and to other airlines from Belfast is high.
On the grapevine, I hear that there are currently 1200 online applications with flybe, of which c600 have been "processed", ie considered, the back-log is due to admin staff shortages.
Hope that helps,
FB