Great thing about Brit shows is that they never overstay their welcome. The Office UK is two seasons. It remains a classic. The Office US lasted, what, 8 seasons? 9? It was a great show that turned to shit.
British tv format eviscerates American. If How I Met Your Mother were a Brit tv show, it'd be two-three 10 episode seasons and you'd have met the mother by the end of season 2. Instead, in the American version we have a 9 season tv show, and we just finally met the mother in season 8. That is bullshit.