Hi there! First time poster - Vanguard is a SSBN and carries the Trident Strategic Deterrent (Nuclear Missiles to you and me) Astute will be a SSN - an attack submarine meaning that it's role is both counter surface vessels and counter submarine. Astute is not capable of either carrying or launching Nuclear Ballistic Missiles of any type. On the CVF (future carrier) it's still 'on track' and expected to weigh in at around 50k - 55k tonnes, just over half the size of the largest US carriers. Names will be the Queen Elizabeth and Prince of Wales.
Well you do surprise me! I guess the presence of the nuclear reactor confuddled me a little. So I suppose this means the Astute is going to be used for cruise missiles, special forces insertions and such, which would also mean the Vanguard will be around for much, much longer.
It's good to hear that the Aricraft Carrier is still on course, is it just the one or two like originally planned? We need them, it's definetly time to retire the three we have now which, if I'm not much mistaken were not even supposed to be aircraft carriers in the first place.
Finally, not wanting to sound like I know nothing about the Navy, but what sort of vessel is the T23?