I don't have any statistics to share with you, but in the last couple of years pretty much every mainstream restaurant chain in the UK has added at least one vegan option and few vegetarian options. And I frequently hear non-vegetarians saying that they sometimes choose those options (either because they feel like it's a more ethical choice, or simply because they like that particular menu option).
Some people seem to consider meat a necessary part of every meal. But that number of a relatively small percentage in my experience.
Some people seem to consider meat a necessary part of every meal. But that number of a relatively small percentage in my experience.