I've not heard that unpasturised juice is unsafe,

http://www.fda.gov/fdac/features/2001/201_safe.html

2001! I'm surprised I hadn't come across that one before, but it's
reassuring that the reported bugs don't appear to include listeria, not that
it's good to get the others, but that's the one you really want to avoid!

Almost all juice in the US is pasteurized.

I'm not sure the same is true in the UK, I'm presuming stuff that is
marketed as freshly squeezed is not? or is it, after all, fresh milk is
pasteurised, the labelling difference in the UK is "made from concentrate",
or "freshly squeezed" and "not made from concentrate", to indicate it's not
the same as the stuff you can get non refrigerated that lasts for ages. It's
funny how different things become problems in different places, in part due
to peripheral issues surrounding preparation, and with things like fish,
where they were caught.

Anne