illegal? I find that hard to believe... maybe to cattle and sheep, since mad cow disease is a mutated form of scrapie which is a sheep disease, transmitted to cattle because they processed diseased sheep into meat meal to increase protein for the cattle...Actually in Great Britain it is illegal to feed any meat, cooked or raw, because of the risk of salmonella.
but to say it's illegal, you would have to specify for which species it's illegal to feed it to. I have a number of friends in Great Britain that feed raw meat to their animals on a daily basis. especially their dogs and cats. raw feeding is NOT illegal for all species, but may be illegal for animals intended to be slaughtered and their meat sold commercially for human consumption... (ie cows, pig, sheep, etc).