Scuttled,
I think you are smoking something rather special. In the timeframe under consideration - up to 10 years - the RAF are out of the MPA capability, period. IF MOD decide to return to fund such a requirement then part of the argument will have to be "who is best fitted to re-establish this additional ASW capability?". The answer may not be "the RAF". In fact, all things being equal, the RN will be in a far better position to integrate it into their ongoing ASW orbat. Indeed they will probably piggy-back with the USN in the build up to the first Sqn IOC, As they are doing with JSF.