Originally Posted by Globaliser

Some but not all. I don't know how up-to-date Airfleets is, but that lists seven -400 series aircraft for Comair, 3 of which are originally ex-BA (the former G-DOCC, G-DOCJ and G-DOCK). One more seems to have come via BA (as G-BVNM), although originally an Air Europe aircraft. Other sources are Malaysian (identifiable by the internal placards in the toilets, for example) and Qantas.