Most of the time when ScotAirways are at Heathrow, it is for charter work, as mentioned by a previous poster. They are very popular with football teams in particular, as their D328s offer just the right number of seats.
From the construction site that is better-known as London Heathrow Airport
Hi. The aircraft was G-BZOG, and operated BD421 LBA-LHR and BD422 LHR-LBA on Sunday. It was operating sub-service for bmi regional. I'm not aware of any other planned flights, but anything could happen!