This week, with the opening of the London Film Festival, two important international directors and their work BUNUEL'S . BELLE DE JOUR The veteran anarchist film-maker shown at work in the Alps last year on his latest film. Belle de Jour won the Grand Prix at Venice, and opens this week in London. RENOIR'S' LA MARSEILLAISE' Jean Renoir discusses this little known film of his most creative period. It opens the Festival.