Most strict vegetarians steer clear of beef suet Andy - vegans will not eat any food priduct that comes from an animal whether living or dead (eg dairy products) and strict vegetarians will not eat any product made from the body of a dead animal. Many veggies will not eat cheese made with animal rennet, anything containing gelatine, certain alcohol products that are filtered with fish scales etc. You can get vegetarian suet and vegetarian mince pies, but I would avoid mince pies altogether unless I had bought them myself when I was a strict veggie - just to be on the safe side.