This is an entertaining smuggling yarn with an excellent cast.Nigel Patrick is good in the lead role ably supported by Jack Warner,then at the height of his Dixon of Dock Green fame.The chief villain is Terence Morgan assisted by American,Theodore Bikel.Even smaller roles are well cast.The inimitable plays the aristocratic birdwatching,and is hilarious as usual.Eric Pohlman is a gang member who wants to spill the beans to get a shorter sentence.There is a lot of cars dashing around dark London streets.Strangely the package of drugs is supposed to be at Victoria Station but it is clearly Waterloo.Shame that this film now seems to be virtually forgotten.