They aren't unaware of the problems. Here's a piece from the Guardian
Locals have complained that rampaging boars plough up gardens and crops, panic horses, rip up roadside verges, open rubbish bags and are increasingly causing road accidents. "In 18 months' time, it is said we could have 1,000 wild boars in the forest. Nobody knows how many it can sustain," said Martin Quayle, the district council cabinet member for the environment. "They make a hell of a mess of the verges. Some people say the place is so untidy that it's begun to look like a tip. On my lane, they have dug up the verge three times in the last year."
"A lot of people get really steamed up about them. But it's very delicate. Everyone feels there should be some culling, but others say it should be turned into a tourist attraction and that we should attract hunters. Some poaching already goes on."
It's just that the English have a... peculiar attitude toward animals. But if the boars are frightening the horses, that will make then get serious about the problem. That is right out