In the Falklands nothing anything the Vulcan can do can be done by Harriers off the carrier's.
Iirc the B3 was to be the Skybolt carrier assuming the US doesn't cancel Skybolt just as it started working then you could butterfly away the Royal Navy Polaris boats. That will cause major changes to the navy maybe a new class of carriers get built but hopefully not the CVA-01 design that was too much on too small a hull