Thanks mate!
I thought as much, but when I attempted to turn it off yesterday by going through the iTunes/App Store settings, it just showed my email address, and would only let me interact with that. At the time I was having issues 'connecting to the iTunes store', but since I changed the date and back again, I can connect - weird, hey?
And since am able to connect to the iTunes store again, the other settings are showing up, so I've disabled automatic downloads. I didn't realise that those settings only appeared when you were connected to the iTunes store?