Station Locations for the Angry Silence
I believe the station at the open and close of the Angry Silence is Willesden Junction, having cross referenced with the film and a signalling plan of the station I'm almost sure the scenes where the chap alights and departs are Willesden Jcn. Willesden Jcn was a 2 level station with High level platforms for trains to Acton and Broad Street and Low level platforms situated on the LNW mainline from Euston to Watford and beyond, the Low level platforms were demolished in 1962 but the high level section of the station still remains.
The station also shown in "School for Scoundrels" was Hertford East which is still open, I've included a link with some quality shots of the station and its platforms which should compare well with stills from the film here
I hope this helps your quality site in some small way.