Astute
1. Give the RN a full complement of 8 Astute submarines.
2. Make a small increase in the Tomahawk order.
3. Build or purchase 64 W80 warheads, mixed yields.
Job done.
My idea..... No.
It was the budget option put forward in 1983 by David Owen as an alternative to Trident.
Less bang, but you can keep several well dispersed submarines at sea