I would of thought that the NQY domestic route will be STN in all honesty, however MAN or EMA could be possible, as pointed out the MAN numbers are rising each month.
If they go for STN could BE operate alongside ? probably not, could BE operate summer season NQY-LCY or return to SEN with the route ?
On the subject of MAN, i would fully expect the current Flybe operated route to go double daily next summer up from 10 weekly current summer season, however to fully make use of MAN for connections they would need to base a second aircraft at NQY and operate an early AM departure to MAN with an evening return in my opinion.
cs