I have a thread here for people to post their recommendations for British shows/comedians. I kept updating the list on the OP, it's fucking huge now. The thread ran it's course though. There are enough shows on that list to last a lifetime.
Jimmy Carr, Frankie Boyle, Jon Richardson, Sean Lock, Ross Noble, Lee Mack and Russell Howard all rank highly for mine.
I second this.
2015 GFX Poster of the Year
2014 Winner of Best Signature & 2014 GFX Poster of the Year
2013 Winner of Best Signature & 2013 GFX Poster of the Year
2012 Winner of Seabs' Heart & 2012 GFX Poster of the Year