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 upsets 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.
as Pearly Gates
as Inspector Fred 'Nosey' Parker
as Nervous O'Toole
as Valerie
as Trainer King
as Jack Coombes
as Bluey May
as Reg Denton
as Assistant Commissioner
as Sid Cooper
as Superintendent J.S. Forest
as Dowager
as Brassknuckles
as Siggy Schmoltz
as Misery Martin
as Annette
as Alf
as Woman at Meeting (uncredited)
as Police Officer (uncredited)
as Educated Ernest (uncredited)
as Adulterous Man (uncredited)
as Maurice (uncredited)
as Postman (uncredited)
as Van Driver (uncredited)
as Sergeant at Police Station (uncredited)
as Police Constable in Garage (uncredited)
as Police Constable at Station (uncredited)
as Police Constable at Scotland Yard (uncredited)
as Airport Official (uncredited)
