The reason that the UK does not allow the feeding of kitchen waste to livestock is mainly from the huge "mad cow" outbreak some years ago. It was discovered that a lot of livestock feed contained animal by products in it. Animal by products in feed, when they are from infected animals can cause disease in the animals it is fed to. Scrapie and bovine spongiform encephalopathy (mad cow) disease is not killed by heat so the infectious agents are present in the milled feed if a diseased animal is rendered in livestock feed. The BSE outbreak in the UK caused the loss of most herds and an enormous financial loss to British farmers. Cattle herds were destroyed because unlike a ot of diseases BSE not be tested for without killing the suspected host animal and examining the brain.
I agree that if you don't plan to eat them do not raise pigs. If you want to have something that will eat your kitchen garbage use chickens. We have raised a lot of hogs over the past years for the Fair and for home consumption. Pigs are omnivores and will eat everything you choose give them including meat scraps, dead rabbits, chickens, etc. In the 20's and 30's a lot of gangsters are reputed to have kept farms as well as other businesses that would cover up the disposal of human remains. Hogs will eat people. When my children were small they were forbidden to go into the pig pen particularly when we had multiple hogs in one pen. If you have only one pig they get fairly friendly. However, they grow fast and are hard to handle if you have no experience due to the fact that there is nothing to grab hold of on a hog. The best, and time honored, way to grab and pick up young pigs is by the back legs. If you are removing them from the mother to give shots, notch ears, etc. when held upside down by the rear legs you have control of their bodies and they stop the ear splitting screaming that so enrages the mama. They are over 300 lbs. at slaughter time which can be as young as 3 months after buying your weaner pig just off it's mother so can not be grabbed that way then. A standard pig will keep growing forever - the "giant" hogs you see at carnivals are just hogs that have been kept for years and have kept growing to 900 to 1000 lbs. We don't like pork enough to raise hogs for ourselves now.
Chickens will also eat meat scraps, including dead chickens, rabbits, etc. I used to throw any rabbit kits that died to the chickens and they would eagerly gobble them up. If your chickens are not interested in scratching through your kitchen scraps, you are probably overfeeding them. Cut back on their feed and they will eagerly gobble up the kitchen scraps. You will also cut your feed bill a bit too by decreasing the amount of chicken feed you feed.
