EGHQ,
For some 30 years, that I have been aware of, the biggest offput to punters has been these two stage flights and it was only because Brymon, then ASW, had a 'DHC' qualified maintenance dept, DHC6 then DHC7 then DHC8, which ultimately proved to be their downfall, there are 30 (ish) seater aircraft out there .... "Can't consider those, they're not manufactured by DHC, we'd need to pay for new maintenance approvals and training".
If anyone is on local BBC please make a point that the supposed appointed experts could have learned more just by reading a spotter publication ... only 2 airliners, capable of PLH operations, currently in production ... my ass!