B H R
In practical terms, the Admirals may have insufficient influence over the decisions on what to buy. It is, however, senior Naval staff who draft the statements of requirement for what they actually need. The strategic deterrent is another matter all together and if the Navy is tasked with providing it, they propose the most efficient, economical and survivable means. SD has nothing to do with the CVF other than being the sponge that may remove its funds. If that's your worry, I share it but debating the need for SD is outside the scope of this Thread.
samuraimatt
I concede that you may be at the correct grid reference but would suggest you are on the wrong planet.