But the UK is probably unique in this - I can't think of another western ally planning on CTOL CVs without an indigenous CV design.
Given that there are probably only two or three nations (four if you count the PRC Flanker knock-offs) on the planet actually producing naval fixed-wing aircraft and no nations producing STOVL carriers (not LHAs) with indigenous aircraft, that's probably not a particularly unique situation, now or in future........