[quote] Is the fact the reg appears to be G-MIDF (an Airbus A321) telling us something we ought to know? <hr></blockquote>
If you look at the 'fleet' pics in the bmi inflight magazine, all the planes except the 330 have the same reg - and I think it's G-MIDF. I guess MIDF was one of the first painted in the new colour scheme, and they edited all the pics from that.
Which still doesn't answer the question of the source of the picture above.