Re: Would require steam catapults
As far as I recall, a navalised Typhoon was considered for the navy, but the yanks convinced our government that the F35 would cost less.
It may. For other countries, not UK.
Some of the other countries which used to operate Harriers after choosing F35B went for a lighter amphibious assault/carrier ship. They effectively downgraded to a ship smaller than their previous "Harrier Carriers" which were similar to UK's old Invincible class.
Example:
OLD Spanish aircraft carrier: https://en.wikipedia.org/wiki/Spanish_aircraft_carrier_Pr%C3%ADncipe_de_Asturias - similar spec to Invincible.
New Spanish (they do not even call it carrier): https://en.wikipedia.org/wiki/Spanish_ship_Juan_Carlos_I_(L61)
Half the capacity, specifically built for F35B or similar VTOL aircraft + helicopters, also capable of carrying landing craft, cheap and already ordered in one form or another by 3 other navies. At least one of them specifically as a F35 + power projection platform. If UK went down this route it could have had 4+ of these for the same price as QE and PW with 3+ of them operational at the same time delivering much better bang for the overall buck.
The reason why the F35B UK programme is so bad value for the money is not just the aircraft, but building a single purpose aircraft carrier for it which is in the same size/displacement zone where you can have a real one launching real aircraft. This defeats the purpose of spending money on VTOL aircraft.