Have some good news after alot of work
Fully reinstated rear fog light with EU style switching handle, so i can enable front fog laps, and toggle rear fog lamps, also lamp on dashboard will light up accordingly. Made simple circuit that was suggested by Petras, and it worked great. Also with 3D printer made simple box for easy fitting under steering wheel.
And oh yes, my car today was transported to place, that will cure all BRZ problems, frame and paint, and very close to them are two firms, who will check give MOT,and register my car for street use