Question for those in the UK: is it safe to eat raw vegetables?

Hope this isn't a stupid question, but I'm going to be spending some time in the UK and was wondering about something. When I've been there before and went to get groceries, I noticed that on the bags of baby carrots and spinach and stuff there were warnings printed to cook them before eating them. Do people just go ahead and eat this stuff raw anyways? I've never been sure if the warnings were just a technicality we don't have in the US, or if there's a real risk of illness associated with eating the raw stuff. Thanks!!