Well done MG for extracting some interesting figures, although it wouldn't surprise me if not all Forces calculate their expenditure in the same way.
I presume your figures are for pre-NPAS actual hours and post-NPAS contracted hours? If that's the case, it will be interesting to see (after a full year or so) how many of the Forces, certainly without in-county aircraft, actually get what they're paying for - and also how much service they actually received in comparison with the past. Sadly, a lot of data (Task time / Transit time) will likely have been lost from those bases that have closed and, although it should have been part of the original business case, it'd be a few years out of date.