Totally and utterly agree with the above.
Just look at previous conflicts in the last 30 years and ask have we the capability to do that again and the answer will probably be no. The Falklands for example is a prime interest to the UK because of the natural resources in its waters, could we fight another war for it...NO.
And the typical spiel you get about the new ship etc being 3 times more capable as its 3 predecessor's does not cut the mustard when you need it in three different places.