As for Command Eject, my memory may be fading but I'm sure it was fitted at ALL models of F4.
Dom2. I didn't think anything in the RAF inventory had command eject when the Mk10 in the Hawk/Tornado came into service . I know the MB Mk7 seat was retrofitted with a command option, but don't believe the RAF used it. I recall an F4 pilot being lost in the late 80s with a medical issue in flight. The nav stayed with him for a while but then ejected when he stopped getting any response from the front seat. Surely if they had command eject they'd have used it!
The first truly universal command eject was not until the Harrier T10 which had universal front-to-back, back-to-front, both and off selection options.