Went to a screening of The Peter Serafinowicz Show tonight; just a pilot, but very funny. Mainly focuses on his range of impressions to parody adverts, TV shows and the like so some of it requires a bit of knowledge to fully 'work', but there's still humour there. Reminded me of (admittedly very little) what I've seen of Mike Yarwood. Oh, and it's written by Peter and his big-brother James.
Other notables spotted:
Graham Linehan (Peter's brother-in-law, apparently)
Sarah Alexander (apparently she's pregnant with their first child)
Tamsin Greig
It'll broadcast in November, probably BBC Two.