The Wrong Arm of the Law

The name of this movie is The Wrong Arm of the Law released in 1963-03-17 and it's main theme is The crooks in London know how it works. No one carries guns and no one resists the police. Then a new gang appears that go one better. They dress as police and steal from the crooks. This upset's the natural order of the police/criminal relationship and the police and the crooks join forces to catch the IPOs Impersonating Police Officers, including an armoured car robbery in which the police must help the gangs to set a trap..