A 30,000-ton carrier is still too small to operate real high-performance aircraft. Yes, you could use navalized variants of the Jaguar, Etendard and Crusader. If you are bother with a CATOBAR carrier, go to 40,000-tons ish and get something that can use large aircraft.
That would allow the UK to comfortably use the Buccaneer, but the Kestrel would be a big expense when the UK could buy CATOBAR aircraft such as the F-4 Phantom. Considering the timeframe we're looking it, they would probably buy the F-14 Tomcat and the AIM-54 Phoenix instead, thus giving Britain a great-big sledgehammer to use on the high seas. If the UK had a new 40-45,000 ton carrier (or two), I still don't think it would have scared the Argentines enough for them to back off. And considering the F-111 was developed initially with a carrier variant in mind (even though it turned out to be a POS), that might actually hurt the TSR.2's case more.