Best British movie ever?

This always tops the list. Also the best Cold War themed movie.

Uh, what does?

He's probably referring to Dr Strangelove.

Edit: I see we are somehow in a forum for the film The Third Man. So I guess it's that.

I'd go:

20. Dunkirk (2017)
19. Aftersun (2022)
18. Walkabout (1971) Roeg
17. Fish Tank (2009)
16. Oliver (1968) Reed
15. Sexy Beast (2000)
14. Rebecca (1940) Hitchcock
13. KES (1969) Loach
12. Withnail & I (1987)
11. Brief Encounter (1945) Lean
10. The Remains of the Day (1993)
9. Blackmail (1929) Hitchcock
8. Repulsion (1965) Polanski
7. Don't Look Now (1973) Roeg
6. Lawrence of Arabia (1962) Lean
5. The Third Man (1949) Reed
4. Barry Lyndon (1975) Kubrick
3. 2001: A Space Odyssey (1968) Kubrick
2. Blow-up (1966) Antonioni
1. Bridge On The River Kwai (1957) Lean

Couldn't be bothered to look the other directors up.

a fine list

The Third Man is good, but not one of my favourites. 2001: A Space Odyssey would be my pick for best British film.