Trimble was head of production at Turner Films, released by Cecil Hepworth, and over the next three years he wrote and directed some of Britain's most highly regarded films of the period. They included "Rose of Surrey" (1913), described by "The Bioscope" as "one of the most charming English film comedies ever produced"; "My Old Dutch" (1915), which "The Moving Picture World" called "a rare picture, great in its simplicity, strong in its appeal, and splendidly played by its two principals"; and "Far from the Madding Crowd" (1915).