Classic British cinema; acted in a way that only British actors of that period can act (1945)! Superb, the children are frightful! And should be locked in their room with no supper!!! And what is that thing they are using to keep the coffee hot? This is 1945; how the other half lived!
The flash backs, the voice over, all add to the inner tension caused by the conflict of conscience. Shall I, shall I not. What if? What will be the consequences and did the husband guess all along? It is all frightfully middle class, yet they were travelling Third Class on the train, the likes of which will never be seen again. The characters are all very vivid from the lady behind the counter - "I do not know to what you are referring", the Station Master, and the irritating friend, "No sugar?".
Just classic cinema from an era now long gone and irretrievable, but never lost because we have the DVD!!!!