The Big Job

At the end of the film, Joan Sims as new head of the gang, plans to rob a train from Edinburgh with used bank notes worth five million pounds. This film was made two years after the Great Train Robbery; however, that train was from Glasgow and was carrying 2.6 million pounds in used bank notes. Joan also mentions changing the signal to red which occurred during the Great Train Robbery. Also Sidney James' character's name is Brain, hence the Great Brain Robbery. These are all obvious references to the Great Train Robbery.

The shooting script was titled 'The Great Brain Robbery' after the leader of the gang, George Brain (Sidney James).

By 1965, black and white filmmaking was very much on the decline in the UK. This was one of the last feature films made at Pinewood Studios in black & white.

Wanda Ventham (who played Dot Franklin) is mother of actor Benedict Cumberbatch (he wasn't born until 11 years after this film).

Most of the production team had worked on the previous year's 'Carry on Spying' (1964) where the producers had decided that would be the last Carry On film shot on black & white film. Originally, only the beginning of "The Big Job" (the original robbery was set in 1950) was planned to be in black and white and the modern scenes shot in color but when carrying out a pre-production audit of what props and cameras would be available for this film's shoot, it was noted that there was still a lot of unused cans of perfectly good 35mm monochrome film stock available. As there were no major black & white 35mm productions planned for the major UK studios in the near future and as television productions tended to use 16mm film or videotape, the production company was offered the last of the old unused monochrome film stock on the cheap. They duly obliged, which is why this film became a completely black and white production at the last minute and why it was one of the last black and white films shot at Pinewood.