...and, of course, the Predator, Reaper, Shadow, Sentinel, Sea King, Wessex & Whirlwind. Some COTS, some modified and some nailed together in the UK....
The relatively short radar horizon of the Crowsnest Merlin and short "legs" of the F-35B is going to make fleet defence awfully hard work for the limited number of T45s....and probably require a disproportionate number of the embarked F35s for CAP if the Threat requires it.