I am a uk tax payer so I would like a say in this nonsense.
Sure new carriers sound like a good idea so don't f*ck about and make then nuclear. You can then have a steam catapult that we know works. The current new carriers will have to wait for some new tech upgrade electric catapult that is untested before being able to launch larger non SVTOL craft.
Modern reactors are good for 20 years or something like that between refueling. I don't by the crap about Diesel being cheaper to maintain. We have nuclear subs so what is the big deal adding two carriers to the list.
With a nuclear carrier and a working steam catapult you can now do away with the SVTOL craft and stump up for the cheaper aircraft that carry more fuel and teddy bears.
Did I miss something.
Paris because she probably has more of a clue.