GeoIntel, so your suggesting cancelling the MRA4 and buying the P8A Poseidon, which is based on a 1967 737 passenger aircraft (I know it is the 737-800 model now) and converted to military use that would cost UK MOD for say 12 about £2 billion on current costs and exchange rates, would not get any untill at least 2018 after the US navy get their 108. Then add the cost of technology transfer (oh we don't get that, so we have to rely on America to support it at cost) publications, ground support equipment, spares etc all at considerable extra expense on top of the above price for the aircraft itself. Couple that with having to spend even more on the MR2 to keep it going untill we get the P8A, that is really going to work and save UK MOD a shed load of money and grief, not.