FYI
I'm pretty sure I read somewhere that the whole of the Isle of Man is based on MacOS. The main software used for educational Mac networks is Macadministrator, but it's OS 9 only. If you want to get some idea of the numbers of UK edu Mac users, it might be worth emailing Hi-resolution who make Macadministrator.
I have to say, it's not too much fun setting it up though. Very un-mac-like.