According to Daily Echo, Rigby have said they are targeting 1.5m pax by 2023.
Hardly the expansion that BOH is capable of. And this doesn't seem to indicate a large Jet2 base either. 1.5m is very small and well below BOH's ultimate potential, which in my opinion is 2.5m.
Look at BRS with 8/9m. BOH & SOU have the same catchment size and population as BRS. Between BOH and SOU they should be at least 6m combined by now.