I can also see some minor mistakes, but I take it this was more of a speed-paint than an illustration and so there are bound to be some. Nonetheless I really like the style and the composition; well done!
You know what really sucks? Getting trolled into believing that Stephen Merchant's accent was warped from overexposure to U.S. media and then blindly parroting that misinformation (without the ability to delete comments.)
I used to think before I spoke, I swear. Too much time on /v/, I guess.
Shoulda oughta just commented on how great the above picture is.