About the film
The Co-Optimists is an all-talking sound 1929 British musical film revue directed by Edwin Greenwood and Laddie Cliff and starring Davy Burnaby, Stanley Holloway and Betty Chester. It was made at Twickenham Studios. The film was broken up into parts and re-released as six short films in 1931.
From the film's Wikipedia article (CC BY-SA 4.0).