film is undeniably romantic and its plot has some deep subject
matter - two married people falling in love and having to decide
whether to end the affair for the sake of their families. But
the reason this film is so good as is in places absolutely hillarious,
as it has aged incredibly badly.
dialogue is very rich and I don't believe anyone has ever really
spoken like this in real life (except for maybe Noel Coward and
he wrote the story). Basically the two lead characters have to
be utterly, frightfully English about everything and in the end
this film drifts more into being one about manners and politeness,
English reserve and possibly imagination - a British Rail waiting
room is the single most unromantic setting imaginable.