Nuclear power was briefly considered for CVF, but fortunately rejected. I say fortunate in light of the problems France and the US have with nuclear carriers. Nuclear power is very expensive, demands a lot of manpower, and makes refits very long as you basically open up the ship to replace the reactors. Submarines have had the same problems, but the latest reactor cores used in the
Astute boats are designed to last the boat's life.
Even the Americans are finding that refitting and refueling nuclear carriers causes availability issues.
Anyway - back to HMS
Queen Elizabeth: