Phil
It would appear that LEA and Blink seem to think that they can make the
numbers work - they have ordered 40 Mustangs between them for air taxi work. There is also Jetbird in Ireland with orders for 100 Phenom 100s (Embraer version of the Mustang).
Personally, I think that their main obstacles to success will be:
1. Lack of slot availability, particularly in SE England.
2. ATC are unlikely to allow these aircraft up to their optimum cruise level (in the order of FL40) when they can only make M0.6 at best. Therefore they are likely to spend most of their cruise time bumping around in the weather with the TPs.
3. Lack of pressurised luggage space
4. Lack of availablilty of suitable pilots. Flying these aircraft commercially and safely will be no job for low-timers and I don't know many pilots of "grown-up" bizjets (Myself included) who would want to trade to work in a toothpaste tube without an APU unless there were some serious salaries on offer. Exciting times, though!
AP