But if they buy the F/A-18 then there's no need for the Typhoon to be carrier capable.
The French would still be in the ECA so yes Typhoon or Whatever it would have been called would be carrier capable... french involvement in ECA went back into the 1970's. its fair to assume had the British and French requirements not differed (mainly due to Britain notrequiring a carrier aircraft) forcing france to go alone and Britain then to team up with Germany then ECA would not have become ECF and would probably bee ready earlier for not only the RAF and FAA but also the Arm D'La Air and French Navy. Germany, Italy and Spain would probably still have jioned as would probably the Netherlands (they were involved at first but soon pulled out). so not only are you altering the British carrier history but France too....
Leasing not buying F/A18C's isnt an unreasonable assumption....
i think a more prudent question is what AEW and ASW aircraft, Hawker had designs for both....