Just to add my ten pence..
G-BNWH (2 class 30J/183M) is a BA a/c operated by BA flight crew & BACX cabin crew.
BACX ops (formally BAR ops BHX) look after the flight watch etc.
The only time BA ops control get involved is when G-BNWH is on maint or tech, when we send a LHR 763 (3 class 8F/36J/134M) to MAN.