At the risk of getting emroiled in a "spotter's paradise"... I though the Buccaneer was designed as a Naval aircraft from the outset (and only taken up by the RAF in MkII version to fill the gap left by the cancellation of TSR2 / F1-11 projects).... also the original design spec for the Harrier was as a joint RAF/RN aircraft, including a two seat, supersonic variant for the Senior Service... but I am sure you'll correct me?
Incidentally, the WWII Chance-Voigt Corsair was taken onboard by the RN, after the USN rejected it as unsuitable for deck landing (due to lack of vision around the long nose on finals... giving it to the USMC for shorebased operations instead)... the RN, out of desparation, adopted a hairy, constantly curving approach to the deck (See "Carrier Pilot" a first hand account by Norman Henson)... Not too sure todays Fleet Air Arm would want to take the similar risks just to get the Typhoon to sea?