I do hope that it is £15M for the whole crew and not each family - that would be outrageous otherwise. Just over £1M per family would be about right (IMHO).
Sadly, that'll be another £15M from the defence budget that will not go to the front line and will probably cost someone else's life as the MoD can't afford the right kit (I know its an unlikely "probably", but the pay out could have this consequence).
Anyway, if it's any comfort I believe that the MoD is learning its lesson from XV230 from all the shenanigans going on with MRA4. They are raking over that aircraft with a very fine toothcomb from what I hear...
It's just sad that we had to lose good people to reinvigorate what we had years before.
LJ