Maremmas aren't illegal, no, but with small fields, multiple public rights of way, multiple roads... simply not a viable option. If I was still on the moorland farm, 1000 acres in a ring fence, just one road in and out and it doesn't go anywhere else, and just one seldom-used public footpath, then maybe - but not where I am now. There are tens of thousands of visitors every year to the Roman Wall site, two national trails, any number of cyclists...
Not to mention our stupid laws would no doubt mean that we would be sued by the owners of any dog attacked by our livestock guardians, however justifiably...
and the same would be true of any guardian tup, too, Steve.
My family used to have a very small factory in the Midlands, situated next to a railway line. Every Bank Holiday, hoodlums would get onto the railway tracks, jump across to the roof of the factory, break in, cause some damage and nick a computer or two. Every Bank Holiday, the thieves would be well away by the time the police arrived... Eventually the works manager put coils of barbed wire
inside the skylights to prevent the thugs getting into the offices even if they got onto the roof and broke the glass. The factory's
own insurance company told them to take the barbed wire out, since even though anyone who was injured by it would necessarily be in the throes of breaking and entering, apparently there was lots of case law where just such a criminal was able to successfully sue the owner of the premises for causing actual bodily harm.
. Stark staring bonkers. (Shakes head in disbelief.)
So the chances are slim to nonexistant of being allowed to have any kind of livestock guarding creature that is actually allowed to protect your livestock by any means more than holding up a sign saying, "BOO! (please, if you don't mind)" - that is, after holding up a sign saying, "If you are of a nervous disposition or have a weak heart, please look away now."