The Blue Lamp, directed by Basil Dearden with a script by T.E.B. Clarke, features Jack Warner, Jimmy Hanley, Dirk Bogarde, Robert Flemyng and Peggy Evans in the cast. Ernest Irving composed the music, and Gordon Dines was responsible for the cinematography. The film introduces Andy Mitchell, a rookie joining the London police, who is mentored by experienced officer George Dixon. Following Dixon’s death at the hands of an impulsive criminal, both the police force and the local neighborhood unite to apprehend the perpetrator. What truly makes The Blue Lamp worthwhile is the opportunity to see what policing was like in earlier times. It portrays a period when British police officers were respected figures who provided comfort and security; they patrolled the streets so people could feel safe at home, and assistance was readily available with just a whistle. Ealing Studios has done well here, capturing that feeling perfectly. The setting and language used are authentic, and the story is skillfully told, highlighting the regrettable rise of criminals prone to using firearms—a new kind of criminal lacking any sense of restraint. Visually, it’s appealing too, with a film noir style for nighttime scenes, and Dearden delivers an exciting action sequence alongside a suspenseful concluding pursuit at White City Greyhound Stadium. The acting occasionally feels somewhat restrained, typical of the era, and the movie certainly presents a romanticized view of both the police and the community they serve. However, these are minor issues that don’t detract from the overall enjoyment of The Blue Lamp. It's a very absorbing film to watch. 7.5/10

Source on TMDB