Jonathan, I actually had you in mind when I stated that some newer members might have not seen it; you can order the DVD from Amazon. It is a gentle comedy, not a great film but quite good for lazy Sunday afternoon viewing, you can see some other intersting vehicles in it, including a trolley bus. It was mostly filmed on the Thames somewhere around Hampton Court/Teddington and I would love to know if anyone here has a better idea of the locations.
There are also good shots of George Cole/"Arthur Daley" driving possibly this same Heinkel in Blue Murder at St Trinians, and Ian C again in "I'm Alright, Jack".
From a similar era there are some nice cars and one funny one in "School For Scoundrels", the original one, with Ian C again and the ever-brilliant, ever-caddish Terry Thomas.
These old films give a lovely look at how England/London used to look and the sorts of vehicles around then.