The influence on other crime films that came afterward is pretty apparent, with one I noticed right away. The great murder sequence on the carnival ride is reprised in similar form at the beginning of another noirish Brit crime film from 8 years later, Cast a Dark Shadow, where Dirk Bogarde is on an ominous funhouse ride with his older paramour (nothing actually happens, in that case, but the tone set is very similar). And perhaps Hitchcock got some ideas from Brighton Rock for his carnival murder sequence in Strangers on a Train.
I had always heard that Attenborough's character in this was a real bastard, but wow, I didn't know the half of it! I was pretty stunned when he does the recording for the girl and explicitly calls her a "slut," since they almost certainly couldn't have used that word at the time if it had been made in Hollywood. Also, related to that, regarding the ending...
Spoiler
Is it really all that "compromised," even if the British censors imposed it? Whoever wrote the IMDB trivia entry suggests that the last shot of the crucifix is meant to suggest Pinky's salvation, but it came across to me as much more cynical than that. The scratched record leaves her thinking that he really loved her and (by implication) that he was "saved" in some way, but the audience still knows very well that he hated her and was trying to kill her! For her naivete to persist like that seems like an even more scathing ending to me than one in which she hears the full recording, which the IMDB entry claims was the original way it was supposed to end.