5 rings, bug speed et al
Whilst your adherence to the company line is admirable (with a dash of self interest no doubt) beware of being blindly ignorant.
Nothing is impossible. Whilst unlikely, if say 30 skippers left for other pastures over the next 2 months. And with Jet 2, Flydubai amongst others that could happen, do you really think Flybe wouldn't employ from their pool of DECs? Of course that assumes there are any left, I doubt many are still waiting. It would be difficult to train that amount of Captains, not to mention the sheer disruption of having 30 newly minted Captains in the airline. I suspect they may have a look at a mix of new upgrades and bring in some experience from elsewhere.
And this assumes no SFOs will depart. And let's be honest as far as turboprop drivers go, in the UK anyway, Flybe guys are probably towards the top of any proper recruiters wish list. And I haven't met a Flybe FO who isn't desperate to leave.