Hi
I thought it was excellent - the point you made about repitition of sketches is spot on - The Fast Show thrived on it, and was able in the last series to do away with some of the expected repititions/punchlines in place of alternatives, which just goes to show how established the format was.
The poem at the end reminded me of a slightly cruder sort of thing Tony Hancock did a few times in his radio shows (I dunno if that was a conscious thing), which personally is the highest compliment I could give.
The only critisism I'd say, is the danger that the whole 'rude-boy'/chav thing feels slightly dated - it's been done a lot before (Ali G, Catherine Tate show), and you might wanna look at an alternative character - that's not really a big problem in my view, as the tightness of the writing and the silliness at the end could quite easily work with, off the top of my head, a pretentious urban poet...
That all said though, I have taken rather a lot of heroin tonight so I might be wrong. Just got to go to the....nope, on the floor again