Wascrew
The cost of BA crew is £60 per hour. Other carriers have crew at half the costs.
13000 crew are required presently because of a large number of part-timers, and some pretty restrictive working practices, in both long and short-haul. Strip out the innefficiencies, and you need many fewer people.
Do you have a method to reduce BA's cost base, and end the continuing strike threats year after year? I can't see any other way.