Crossovers That Should Not Be 22: Pushing it over the Hedge.

[classicdrogn]

I'm pretty sure I've seen that, though it was Harry D who went to Britain. It would have to have been before 2006, on FFn, and I don't think it was very long at the time. Really though, if you just poke the crossover categories or character lists for HP/Dresden it shouldn't be hard to turn some up... whether or not the fics Should Be, well, that's up to the eye of the beholder.