Yaletown.
There is no rostering; you bid for your schedule
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British Airways Flt. Deck Crew went for the N.Am. bidline system in the 70's, and yes, the old ( over 50 !! ) grabbed the best routes, either more allowances, better routes, or least time change (i.e.UK -Africa ) for personal convenience.
B.A.Aircrew with a compulsory retirement age of 55, until recently, retired 10 years earlier, and served 10 years less than general staff, so effectively lose out on rebate travel concessions by 20 years in comparison to others, and some, who accepted early retirment at the request of the airline, by even more.
I'm long out of it, and as this is a Cabin Crew thread I can't comment on current C.C. practice anyway, but rebate travel concessions are equal - or rather were equal - across all occupations within the airline, not now, those who spent their lives creating the once proud airline that the present staff have the privilege to work for, are being roundly screwed.