That's 43 Squadron, which spent most of its time in the Middle East, finishing in the north of Italy. While never saying "never," the under-sized roundels, on the wings' upper surfaces are a mite unlikely, although some Squadrons did misinterpret the order, in January 1945, to paint them to the same style, and proportions, as the fuselage roundels. The fuselage band was not an operational requirement in the Mediterranean, nor was the yellow l/e stripe, and red spinners seem to have been a standard in that theatre.
It used to be possible to buy sheets of a clear material, with low-tack adhesive ("Frisket" in the U.S., I think,) which was designed for photo albums; you could draw the design (in reverse) on the backing paper, then cut it out, peel off the backing, and put it in place. It wasn't too keen on glossy paints, like Xtracolor, though. I've always had success with cutting
Tamiya masking tape into thin (2-3mm) strips, then laying it in place; it's possible to guide the tape round curves quite easily, then fill in the rest with newspaper + wider strips of cheaper masking tape. Being a poor old pensioner
I object to contaminating perfectly good Blutack with paint.
Edgar