"The Angry Silence" can be read in two ways: one, it is a pretty accurate depiction of the way union relations were run in the late 1950s and the shadow of the far left; or, it is a propaganda piece for the far right and nothing like the truth. There are strong arguments for both camps to be correct.
What struck me about the film was the central performance from Richard Attenborough as the lone worker standing up against bullying and blackmail from his trade union colleagues. One scene in particular which takes place in the canteen is a masterclass in screen acting of its type, and there are also good scenes between Attenborough and his screen wife, played by Pier Angeli, and his work colleague and lodger, played by Michael Craig.
Bryan Forbes always seemed to be veering off in different directions with the various movies on his CV, and this is an odd one. Whatever your politics, it is a good film and provokes a reaction. Whether the reaction is one which matches the reality has to remain open to question.