Do you have any idea how long it would take to recruit and properly train up over 3000 cabin crew
With the strikers sacked, and Bassa rendered ineffective, BA could operate to minimum levels for some time. Wouldn't need 13,000 crew in the future - maybe 11,000.
There are at least 1000 recently unemployed cabin crew who could be refreshed very quickly. Then allowing for "new fleet" scheduling I reckon a full operation within 3 months max. BA are newly flush with cash after not having to pay certain fines.