Anton Walbrook did a superb monologue in Colonel Blimp but this is probably even more powerful (49th Parallel from 1941, also Powell & Pressburger of course)
https://www.youtube.com/watch?v=OeEpfiER4YY
Can't agree about the Trial Scene as it is the whole point of the film, the fact it may or may not actually be taking place is of course also the point of the film. Can I presume you don't like fantasy films?
As I have the P&P Box set DVD I have been watching the lot, but tonight is a Double Bill of their finest, first up Life & Death of Colonel Blimp and then A Matter of Life & Death.
Superb performances from Roger Livesey in both, I know he was competing with Gielgud and Oliver at the time but...