I was thinking that whilst reading it. But it's a cute combination in the book, just not very convenient for Milliways. Although that is the risk when you have a character with an ongoing canon. Guppy's canon keeps moving and it makes it difficult because the producers suddenly make new information out of the blue. Oh, and I think they're writing him out, but can't get any decent spoilers, so this is not a good thing at all. It's the same when playing a Harry Potter character; the books aren't written yet so it's never going to totally agree.