Actually, I sound quite posh on that phone post - I always sound more Estuary in my head. And my singing voice sounds like that of a frightened child. The recording isn't actually Sealgirl's request at all. That is a big lie. She suggested Zombie Dad should have a theme tune, and I ran with it.
Zom! Bie! Dad! RRRRAAAAARRRR!
EDIT - Ha ha ha!!! I've just seen the auto-transciption. God, am I really that illegible? I think 'But even Grouse and now they've got a Champy hat' is a much better lyric than I could ever come up with! (the real line there is 'but even gross and undead, what a chance he had', BTW)