THS.
"Now what about Nimrod. Is it a maritime surveillance or ISTAR platform? Perhaps its both. Who's toy box should it be in? Will the Army contribute to the upkeeping of the ISTAR capability if its in RN hands and will the RN be interested in 'its' crews training on those systems? Hmmm, perhaps they'll just bin the ISTAR bit of Nimrod, dumb it down to being just a maritime asset and the Army can buy something else. That sounds like a cost saving right there."
This is just the point. Both the Army and RN need ISTAR, so of course we would contribute. We have land assets (RM) that it would support. More than 50% of the personnel in Afghanistan are RN this year.
Because we are services with many aspects, we understand the need for funding various elements of the war machine.
Unlike, I have to say the RAF, which is so fast jet centric that we have hundreds of modern Typhoon and about 12 chinook.
Not only that, but you may notice that the RN and Army tend to cooperate reasonably well when it comes to territorial disputes re ownership of assets. ie 847 flying Army helicopters.