There's a problem with the these twice-daily business flights. What do you do with the plane and crew in the middle of the day?
If it's any indication of this day trip business market, I notice that BACF, having had, since September, two 'early bird' flights from EDI to City (only one on Friday ) have in the past week had just one, and none on Friday. Perhaps after a brief flurry of in person meetings, the urge has gone.