I got that one too, very very shortly in.

Hey, can you think of any other British film whose hero is a cop?

(You will now name a dozen and I with my insufficient knowledge of film will just shut up over here . . .)

I also caught some Prisoner vibes, but I wasn't sure.

I am almost positive that one character gives another the Village farewell—the eye-salute usually accompanied by the phrase "Be seeing you!"—at one point fairly early on. I might have to see the movie a second time to make sure.