Do bmi regional or Flybe opb Scot have an aircraft sitting on the ground during the day? Would be surprised to see a Q400 by Flybe proper, but who knows. There is no other regional airline with a presence at MAN.
(unless Blue Islands or Aurigny would be inclined to do a Waterford W-pattern in-between their C.I. flight (highly unlikely of course - and I am not sure if they were allowed to:Are they licenced as an UK-airline and are allowed to operate international flights from England?)