Starring Peggy Cummins, Michael Hordern, Anna Crawford and Rosamund John (with a brief first ever film appearance by Brian Wilde!)
An enjoyable and well constructed crime drama, with just about enough intertwined story threads to keep the interest. It's all a bit conservative (that poster should be actionable under the Trades Description Act), with woman officers dealing mainly with woman's crimes, - this is taken to ridiculous lengths at the start, where a homeless couple see a boy fall in the Thames and the woman dives into save him while the man runs for the police. Later it turns out she is on the run after going AWOL from her Army unit. I'd like to think this was a deliberate attempt at showing woman can do anything a man can, but given the tone of the rest of the film it seems more likely that the writer had written the scene with the man the hero, then simply reversed the roles when required.
That said, the last twenty minutes are surprisingly dramatic with some pretty violent assaults and the like, before everything gets tied up pretty neatly at the end.
Plus Marjorie Rhodes, and that's always worth an extra half point.