The last film made at Ealing Studios, London.
The taxi used by Halliday and Ward later in the film (1h20m55s) is a 1936 Austin 12/4 Strachan-bodied low loader taxicab registered CUL883. It is the same taxi used by Mrs Wilberforce when leaving King's Cross Station in The Ladykillers (1955).
The late edition of the "Daily Mail" found in Mrs Elliot's car is accurately dated Friday September 2nd 1955. The safe-breaking robbery at Stone & Co which opens the film occurs on Friday September 9th.
During the decade in which this film was made, Ford V8 Pilots were one of the most recognizable cars in Britain.