Mr. Tea
Let's Talk About Ceps
Some of the humour in LofG is almost in laughing at the way that they have deliberately made it as horrible as possible even at the expense of humour - I'm not sure whether or not that is what is intended but that is how I take it.
Hmm, it was going this way in the second series, I think, and fully got there in the third (which coincided with it getting a lot less good, too). The first series and Christmas special are still brilliant, though.