Yeah we can bring food as far as I know (though not like burger and chips or anything crunchy and noisy I'd imagine...).
We can't, however, bring mobile phones within about five miles of the examination room. I live off campus so I'm in a bit of a pickle with this ... I'm going to have to go the day without my phone, even if I want to go out after exam, etc. Really annoying that you can't just give it to someone like in good old A levels.