RAAF - 2 originally on exchange plus 2 extra as Seedcorn. (If they're all Seedcorn - how come they're on different allowances and rental conditions?)
Retaining skills and MPA knowledge is vital if the United Kingdom is to be in a position to regenerate our own MPA capability at some point in the future.
Closest thing we're ever likely to hear in the way of an admission of "Er, we may have got it wrong."
So soon after the decision too.