I love "Are You Being Served", Mr. Bean, Monty Python's Flying Circus - and the Guy Richie films, Lock Stock and Two Smoking Barrels, and Snatch. Sometimes it's hard to understand the dialogue through the the Cockney accents, but that's what closed captioning is for!
I'm also amused by British colloqialisms and slang - words like lorry (truck) and nick (steal), as well as the peculiar British spelling of words that end in 'or'. They still DO speak English in England, don't they?.
As George Bernard Shaw once said, "England and America are two countries separated by a common language. "
On that note, I'll never forget when a postdoc in my former lab, matter-of-factly told us that he was going out for a f.a.g and asked if anyone wished to join him! We were shocked, then ROFL
when he told us what he meant. Thereafter, he started "going out for a smoke"!