The jag did carry the Phantom Sidewinder racks on the pylons when they were initially fitted, I know that because they had for Phantom use only stencilled on them
Apologies for thread creep, but it was the same for the Harrier. In 1982 I was an EWI on 3 Squadron in Germany, and flew over to Wittering to bring back one of the first jets with the Op Corporate mods. The sidewinder rails had 'For Phantom Use Only' stencilled, just like Nutloose's Jag example. Being a Monty Python fan I took out my chinagraph, scribbled out Phantom, and wrote Harrier in its place in homage to the 'Fish Licence' sketch ('that's not a cat licence, it's a dog licence with dog scribbled out and cat written in crayon!').
Ah, happy days. Never saw a twin store carrier on the wing in my time though.