"Keynsham" by the Bonzo Dog Band gets my vote for the greatest album of all time (unlike their other work, it's more frightening than funny, and thus doesn't get the respect it deserves.

Two funny Brits (the first Scottish, the second Welsh):

Ivor Cutler: https://youtu.be/LddPuhzt0F4

Gorky's Zygotic Mynci: https://youtu.be/sm1kGpvPeSk