Stand-up comedian Sean Hughes wrote and starred as a fictionalised version of himself, aware of the fact he was living in a sitcom. The show poked fun at the 'standard sitcom' with a series of running gags, such as constantly killing off characters and have them return as their 'identical twin'!
Great show from Channel 4 a ways back. Also in the 3 for £10. So can be bought for £3.33 (as many items as you want in that promotion, all will come out at £3.33 when the minimum tenner is spent)