I love that the Daily Mail actually wrote an article on this, which essentially attacked him for all the things he was parodying and actually said 'the source of animosity remains unclear'
The incredible part about this is that despite the character break at the end and the explanation of the satire, The Mail still wrote an article entitled "What prompted comedian's tirade against old schoolmate Richard Hammond". This actually happened, I'm not making this up.
I used to think "and that homeless guy's probably Scottish remember" was the best line Stu had ever delivered in Scotland, but then I remembered the Stand gig he did in Glasgow in about 05 - when he insulted William Wallace at great length to a massive extent, though he'd been past winding the crowd up by that time and they were on his side. Balls of steel, Stu has.