The £40m is a BA figure.
£40m is the yearly savings of having 1000 less crew, 3000 on part time (savings from wages and NI and pensions etc) and the reduced cost of Hotac and allowances for having 1 less onboard.
Amazing how much you can save from such a tiny, insignificant, change. If it was two off, the savings would have been £80m amazing... over half the target set by the company......
CB