One of three items shown in this edition of MONITOR. in CANNES FILM FESTIVAL - Jayne Mansfield leaving London by plane. Actuality material of Cocktail parties, beach and street scenes, film stars, audiences and critics. Publicity men against furthering the art of film. The other two items shown were: WOMAN IN A DRESSING GOWN - with Anthony Quayle, Sheila Sims and Yvonne Mitchell; MASACCIO - Michael Ayrton shows stills of some of his and Michaelangelo's paintings.