The phrase "NATO collaboration" appears a few times in the response, together with "off the shelf" options.
IF the UK is to get a replacement MPA, it would seem that a RPV/UAV option will not be seriously considered. I think a UK owned C295 or Combined Service P8 looks much more likely.
With the reference to the Seedcorn role not remaining the same, I would imagine that the the April 2013 report will give a strong indication of what to expect in the next SDSR.