Police Constable George Dixon's (Jack Warner's) comment about the missing dog, "You ought to have called him Strachey", is a reference to the then Minister for Food, John Strachey. He was in charge of rationing and, like the dog, was accused of stealing food from the people.
The original Blue Lamp was transferred to the new Paddington Green Police Station and stands there today. It has recently been restored.
The producers obtained full cooperation from the Metropolitan Police (the first movie to do so) and were, therefore, able to use the real-life Paddington Green Police Station and New Scotland Yard for their location work.
Apart from occasional tunes in the background, no musical score was added to the soundtrack, enforcing the realistic aspect of this movie.