ICBM or Cruise missiles? That is the question.
The old cold war theories are no longer applicable. The reason for having a nuclear strike force will be based on the need to deter rogue states from threatening your nation. Proliferation is inevitable and disarmament is but a dream. Imagine a world where the only defence against, lets say, a nuclear armed Iran, was your nation's relations the USA? The world is much more scary than it was during the cold war I'm afraid. We need a nuclear retaliation force capable of striking anywhere on the surface of the globe and that force must come at the lowest possible cost. Navy or RAF. Preferably both.