SU5125 : Warren Farm, off Old Down Lane, Morestead
If they really want a disease free establishment, perhaps a "Do not Keep Out sign" is not a good idea?
Seriously, a lot of big pig rearing enterprises, we are talking industrial agriculture here, have isolated piggeries under high security as insurance against disease outbreaks. These are used to keep a reserve of prized bloodlines to start up again if The Lurgy ever returns, and pigs have a few to choose from.