The "Jacket" applies to all male crew who work in B.A. uniform no matter the base (MAN, LHR, LGW, etc) or the subsidiary (G.B. etc etc). It doesn't suprise me that most of haven't seen them as they are not very popular - but some people do force the guys to wear them. You are more likely to see them in club or first on long haul especially. We on short haul do a lot of work in a very short space of time and so preffer to do without them - although it is against the rules.
I may invite some of my collegues to look at this thread from one of our sites as we are having an increasingly heated debate on the subject there.
Again...thanx for your comments again - and keep em coming!!!