The plot is similar to the American film noir by Richard Fleischer, Armored Car Robbery (1950), not only for the plot of crooks robbing an armored car, but the sexy wife of the passive, secondary gang member having a secret affair with the gang leader.
The Pearsons' house is 44 Parkside Crescent, Tynemouth, North Shields - since extended to almost twice its size at time of filming.
One of many British crime films where Tom Bell plays a criminal underling who argues with his criminal boss. Another is A Prize of Arms. In real life he was a true firebrand and very unpredictable, at one point famously heckling Prince Philip, yelling out "Tell us a joke" to the chagrin of his fellow actor-friends at the table.
In modern television showings of this film, during the sequence where a woman is washing her daughter standing up in a bath, the daughter's body has been optically blurred.
The payroll car in the opening-titles sequence is a Humber Hawk Mk III-VI. Another heist film starring Tom Bell - A Prize of Arms (1962), released a year later - also has a similar-looking Humber car (a Humber Super Snipe) shown prominently during the titles sequence.