It’s much ado about nothing. The goats in that Welsh town come every year, it’s just that this year, they’re less timid because there are fewer people around. Anyone who lives in (parts of) Monsey can tell you about deer in their backyards. When I lived in an urban area of New England, we had wild turkeys roosting in the trees. I’ve seen raccoons, skunks, and opossums in urban areas. I’ve seen wild boars in Kiryat Sefer. The monkeys in Thailand and the deer in Japan were always there, but they were well fed by tourists.
A bigger problem is the rats that used to survive on food in restaurant dumpsters and food that people put in public trash cans. They’re now entering buildings looking for food. Rats are more likely to spread disease than are any of the animals in the article (though there’s no evidence that they spread SARS-CoV–2).