The American car the crooks crash into the storefront is a 1941 Chrysler Royal.
Gordon's car is a 1955 Jaguar XK 140. In excellent condition in 2019 this car could be worth $150,000 or more. As of 2010 the car in the film was still registered in the U.K.
The hearse is a 1927 Rolls-Royce Phantom I. Most hearses like this one started out as limos and were re-bodied in the 1930s to 1950s.
Neil Wilson, here playing Sergeant Smail, the policeman with the twitchy eye, played a policeman in many films and television programmes, and in Make Mine Mink (1960) he also appeared in a scene with Terry-Thomas, as he does here.