Re: Roundabouts...
My experience (when L'Etoile roads were wider there and thus more ambiguous) was that you could proceed with curses unless your front wings were actually touching something. I once ate a whole Camembert while politely seeking, in a pale blue Ford Anglia, to exit that ultimate roundabout without contact. Engine seized on the way to Dieppe, but 'those were the days', and we knew where to put some oil (when clearly indicated).