Warn London is a 1934 British thriller film directed by T. Hayes Hunter and starring Edmund Gwenn, John Loder and Leonora Corbett.^[1] It was based on a novel by Denison Clift.

A detective goes undercover to infiltrate a gang planning a bullion robbery.

• Edmund Gwenn - Doctor Herman Krauss
• John Loder - Inspector Yorke / Barraclough
• Leonora Corbett - Jill
• D. A. Clarke-Smith - Doctor Nicoletti
• Garry Marsh - Van Der Meer
• John Turnbull - Inspector Frayne
• Douglas Stewart - Davis
• Raymond Lovell - Prefect

• Warn London at IMDb

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