Quite funny.
At first I didn't realize all the skits were from the same show. I thought "my, that's quite a few British comedy voices for one flash" until I read they were all from a British show.
It's pretty hard to get me to actually laugh out loud, and on the part where the guy with the grey hair keep twittering about from what I think sounds like a bird, I laughed quite heartily and loudly. I enjoy british wit, and this is full of it. It helps that I've been a pretty big fan of Phoenix Wrong flash comedies, so this has the whole bundle. I bet if someone made one entirely with "The Office" voices, it would be just as funny as this. Good show, mate.
Oh also, I thought "I bet I'm gonna hear the word "bullocks" and you didn't let me down. In American, whenever we show anything British we always make them say 'bullocks' constantly since it's not considered swearing in this country, and it's kind of silly sometimes. I rolled my eyes after the 10th 'bullocks' in V for Vendetta. hehe