Flybe have more aircraft arriving over the next few months so I'm sure 1 based aircraft wouldn't be too much of a stretch or they could use originating bases to fly to Derry
Flybe new management over the last year or so have a new attitude to routes that if they are not making money or not enough they will get dropped and dropped quickly (similar to FR) so if they think they can make more money on a certain route Ex LDY they will make aircraft available