I don't know, I'm afraid - someone just told me that they saw a yellow R4 on a TV advert. They couldn't remember the advert though!give us a clue on what the advert is for?
Top marks to Malcolm! Yes, I think that must have been the advert (about 4 or 5 seconds in):One appeared very briefly on a Plusnet advert on Netflix in full side view. Looked like a late '70s car at first glance but I wasn't paying attention.