1805, Im again unconvined by what you are on about this time.All fine and well but it is not operational yet and missed its last test? BMD is currently being introduced into service with the Dutch/Spanish. Current UK Fleet defence is with 5 T42 and Harriers armed with Sidewinders, probably given advances in both attack/defence worst than during the Falklands?
At this present time does the RN need BMD? In the next ten years are there any likely threats from countries to either the UK or RN assets deployed overseas. Is there a current Ballistic missile that can be used against warships? Are you suggesting that we in the UK will be targetted by nuclear or chemical armed Ballistic missiles? If so would BMD on a handfull of RN vessels be more of a deterent than Trident?
I think you are falling into the trap of what is sexy for the USA is a must for us in the UK with our limited budget. If the RN are only getting 6 T45'S, how many less would they get if theT45 came with a BMD technology that is currently unnecessary, 5? 4? 2? Can so few vesels really provide effective BMD locally on Ops or for the UK? If not how many more ships would we need? and will the tooth fairy pay? I suppose we could have bought AEGIS and a copy of the Burke but I dont imagine we would get more than 6 and in ten years time we would be looking at the sexy US upgrades to Standard that we probably couldnt afford to buy. Added to that we would probably now lack a UK based radar industry and I wouldnt have a clue if advances in SAMSON will or has lead to pull through for radars in other projects that will be built here.
The USN has some 60 Burkes and 22 Ticos. We will have 6 T45, with probably 4 deployed in any UK Operation and one in refit, is the sole other really much use chugging about in the channel offering BMD to London? The same will be the case for the Spanish and Dutch, and they also lack their own nuclear deterrent. True some of our allies have impressive kit, but its not much use if those allies shy away from fighting.
If the UK decides in the next 20 years they need BMD then there is already a route to follow. The SAAMPT version of Aster is supposed to have BMD in the pipeline so a version of a missile we operate and a software upgrade to PAAMS may work...if we need it. At present we cant afford it.
Although you point out the poor state of RN air defence curently, then dont you concede that the T45 under construction now, and the various blocks of the QE being built across the UK wont just solve that ???? At present there isnt going to be a repeat of the Falklands, the islands are defended and the Argentines are in no condition militarily to intervene, the launch of QE and POW will put paid to their ambitions for decades.
The only war I can see on the horizon is as part of a coalition in Iran, and that would be sooner rather than later so would involve weapons systems in the current inventory, although I also think people power in Iran may also make intervention unecessary as the present bunch may get outed in a bloody mess.