Maybe an Anglo-French deal with 1 CVF as PA2 and the UK getting a couple of Mistrals would have been a cool outcome, totally unaffordable and fan boy in scope, but its good to dream some days.
By this point in alternate history, you'd better start from zero in 1970. Blend the Invincible with PH75, the later non nuclear. Add the Italians and Spanish into the lot.
End result: 3*Invincible + 2*PH75 + 1*Asturias + 1*Garibaldi = 7 * 20000 tons "Helocarriers" / "Harrier-carriers".
In parallel with that, circa 1973 (the years a Harrier toured French Navy decks: Foch and Jeanne d'Arc LPH) France see the light, screw the Super Etendard and gets Sea Harriers instead.
Or a Big Wing Harrier for everybody - France and USMC included, RN (no SHAR) RAF, Italian and Spanish navies.
In the 80's the 7*UE helicopter carriers enter service. Fine.
From this point on, the alliance split... or partly split.
France and GB start designing a 40 000 to 60 000 ton CATOBAR.
Meanwhile the same countries plus Italy and Spain go the "very large amphibious" (25 000 tons) way. Perhaps derived from the previous ships.
This blend together: Ocean, Mistrals, Juan Carlos, Cavour right from the 90's. Six more ships.
End result: by 2000, Europe has no less than thirteen ships with Harriers on the deck: seven SCS and six big LHA.
Basically, having the amphibious fleet build out of the helicopter-carriers, plus Italy and Spain onboard, is a huge relieve for France and GB in their common quest for large, expensive CATOBAR carriers.
Incidentally, they also have less pressure... because the helicopter carriers and amphibious large european fleet(s) (the 13 ships) can carry Harriers as "Plan B" in case CATOBAR fails.
And this include France, because the death of the Super Etendard also killed any hope of a Rafale-M: basically it got Dassault out of naval combat aircraft. It also re-introduced France to VSTOL / CTOL naval aircraft.
It is possible that GB and France buy 4*CATOBAR carrier togethers, and decides to put F-18C on the deck, and later F-18E. It very nearly happened to France OTL in 1989, only screwed by Dassault and politicians (Mitterrand, you old machiavellian crook !)