Was there a CATOBAR carrier alternative to the Invincible class?
Short answerYes, CVA-01; after it was cancelled, the Royal Navy used the ASW through-deck-cruiser concept to preserve a path back to carrier aviation.
NotesCVA-01 was the conventional catapult-and-arrestor carrier alternative. After its cancellation, policy denied the Royal Navy a replacement for its remaining wartime carriers. The service responded by asking for a through-deck cruiser framed around helicopter anti-submarine warfare rather than fixed-wing aviation. That label made the ship politically acceptable even though the resulting hull could later gain a ski jump and operate Sea Harriers. The episode shows how classification and stated mission can keep a capability alive under restrictive policy.