Lamb kidneys on toast for breakfast (or any other meal), tongue, and still remembering a Lincolnshire favourite, a deboned and cooked and breadcrumbed pigs head (name escapes me now -- ah, Haslet!). Haggis (but not made with minced bus tickets). And I used to buy, in fish and chip shops, bladders of some sort filled with minced and herbed liver (name also gone). All yummy. But I was a war baby in the UK, so we had to eat most everything. And I still do, but it is hard getting any decent offal in supermarkets anymore--and even if I do manage to get some, it's not allowed in the house, so I wait until they have gone away and....