Should Britain develop its own Tempest-derived stealth aircraft for the carriers?
Short answerNo; navalizing Tempest would drive costs sharply upward, while the carriers commit Britain to the F-35B operating model for many years.
NotesBritain has built the Queen Elizabeth class around short take-off and vertical landing aircraft, locking the fleet into that operating model for decades. Adding a carrier variant to Tempest would impose major structural, landing-gear, and maritime requirements on an already costly combat-air program. The more plausible course is continued participation in the F-35 family and later derivatives suited to the existing carriers.