arem
Mea culpa! Yes I got the FC numbers wrong - I forgot to multiply by the number of aircraft leaving the fleet!
Re the ratio of B747 captains:co-pilots, the establishment for this month shows about a 1:1.5 ratio, ie 3 co-pilots for every 2 captains, not 1:1 as you suggested.
Another way of looking at it, 940 pilots on the fleet, lose 10% of the fleet = 94 pilots, lose 15% approx 140 pilots.
Of course, this can only be an approximation, as the real numbers will be affected by the managment and training establishment requirements and the actual change to the destinations flown to. Furthermore, with 55 aircraft on the fleet (plus 2 stooddown at CWL), BA didn't fly 55 lines of aircraft work, probably nearer 51 (with 4 as spares/under check), and probably this 51 lines has reduced to 47 or so already. ie the work reduction has to an extent already been factored into the pilot establishment, so physically removing the additional airframes may well not have as large an effect as at first appears.