VHF,
Indeed you are correct, most bmi flights in (and out) of BHD these days are A321s (If they are taking off from 22, I can see & hear them from the office).
I can understand bmi wanting rid of them, as the 321s are probably some of the oldest aircraft in the fleet (guess), but any flights I have been on BHD-LHR-BHD have always been well filled (of course this wasn't always the case when BA were flying).
Seems that a fall-back to A320/319 will limit bmi's passenger load out of City as they probably won't want to give up any more slots at LHR to increase frequencies for the a.m. and p.m peaks.
Do any other UK city-pairs see full aircraft at peak times, even with a 321? I guess BA compete on most of the others so it is harder to estimate a true peak load?
BTW, the C-class cabin (which I have been known to use from time to time :-) never seems excessively big... most of the bus is Y. (And I am not a CS)
Regards,
Shuttlebus