That's correct. I am a vegetarian by my own choice, but your response stinks of a lack of tolerance or appreciation for other people's choices.
I don't know the actual laws when it comes to labelling of food products, but my initial question was more out of curiousity, not one of demanding that people say to the letter what is in their product. I often have to pass up on produce which should be clearly vegetarian because they don't label it with a "Suitable for" notice.
You said "presumably they would have to declare if this secret ingredient contains animal products" and I was pointing out that they shouldn't "have to", because unlike peanuts which might kill those who are allergic to it, meat won't kill vegetarians.
I don't know the actual laws when it comes to labelling of food products, but my initial question was more out of curiousity, not one of demanding that people say to the letter what is in their product. I often have to pass up on produce which should be clearly vegetarian because they don't label it with a "Suitable for" notice.