I watched this on the talking pictures channel as there was nothing of quality elsewhere, and was I in for a very watchable treat. It had a sterling cast ranging from Joyce Grenfell as a scatty upper class birdwatcher through to Nigel Patrick as a dogged customs detective prepares to risk his life to get the smugglers. If you grew up with quality such as this, you'll find the modern "movies", dull and predictable by comparison. I gave it a 10.