The two Queen Elizabeth class carriers are replacements for 3 Invincible class carriers
The 7 Astute class replace the 7 Trafalgar and 6 Swiftsure class submarines.
With 7 big repl. ships later RFA remains capable.
New more capable and big but not enough.
The Fleet Air Arm is a graphic demonstration of this. In 2009 the Navy had 194 helicopters, after a major modernisation programme by 2019 it will have 83.