"IF" sounds right up my alley ( can't wait to see it! ), but "O LUCKY MAN" sounds like something that I'll hate; though the caste is incredible and perhaps I'll give it a look see, should I be able to find it.
Oliver Reed is one of my favorite Brit actors! :-)
You might like "BLACK MIRROR"; it's French, but there's not a lot of dialogue, so try it, even if you don't know French/hate subtitles.
"MIRROR MASK" is British, so no language barrier, and might just suit your sense of the fantastic and absurd.
Have you seen "BRAZIL"?
I went into the theater to watch BRAZIL expecting a Monty Python-type movie (or at least TIME BANDITS).
Man, when I left the theater, I was confused for a week ...