I think haggis might be covered by the existing blacklist, as it's usually made with lamb offal, and would usually appear as a sub-list on an ingredients list.

I think haggis might be covered by the existing blacklist, as it's usually made with lamb offal, and would usually appear as a sub-list on an ingredients list. For example, here's a haggis pizza: Pizza Topping (59%): Haggis (21%) [Lamb Lungs (33%), Seasoning (Oatmeal, Dried Onions, Barley Flakes, Salt, Spices (Pepper, Pimento), Water, Beef Fat (13%): Beef Liver (10%, Beef Heart (5%)], Mozzarella Cheese (Milk) (21%), Tomato Sauce (17%) [Concentrated Crushed Tomatoes, Additive: Citric Acid, Water, Rapeseed Oil, Salt, Oregano, Garlic], Pizza Base: (41%): Wheat Flour. Additives: Calcium Carbonate, Iron, Niacin, Thiamine, Water, Yeast, Salt, Rapeseed Oil, Maize Flour (and yes, haggis pizza is a thing...! I wouldn't recommend it though, to be honest, even if you do love haggis.)