Ok, back on thread.
2 MD902's, one daily use with a spare to cover the large number of days unavailability of airframe 1, or get a 135/145 which seem to be much less labour intensive maintenance wise and cheaper to run with better performance at MAUW thereby negating the 2nd airframe requirement. How does that sound?
902 seems to be down a lot of days for maintenance and at MAUW as London seem to operate does appear to be power limited.