If you are qualified to be a Q-400 Captain (and I assume you are as you are being interviewed) you will have to fail it in spades not to get in. We are crucially short of commanders, as it is a bouyant time for industry.
FWIW, and I am nobody's company-man, the Q-400 is a fab bit of kit and there's a good life to be had at FlyBe. There are issues to be addressed in the transition from small to large company and some fairly crass practices to be streamlined, but it'll happen.
BTW, the shortage bases are BHD, GLA and EDI in particular but if they don't suit there's a system of 'remote rostering' on offer, a bit like a 'join and terminate' base. Also Part time, 70% (which equals 7-on/ 7-off or 5-on/ 5-off) or 50%; so you can have a job AND a life.
Good luck. You could do a whole lot worse.