The Main Chance

i'm inserting reviews of those films I've seen that lack one, i have a fondness for old b&w British films, so am always on the look out for obscure examples such as this, I watched this in 2009, but can't recall it, here is the note I made at the time....''Routine little Merton Park thriller involving a Mr big of the criminal underworld hiring an ex RAF conman to fly some diamonds across the channel, OK.''