Buy a coyote. Coyote poop is pretty offensive, and especially so when it contains undigested lumps of foxes, but then you can buy a .22 and shoot the coyote. No, wait, you can't buy a .22 and I can. That rules out shooting the foxes....

I'd suggest a leopard, but when they run out of foxes, the neighborhood children will be in jeopardy. With coyotes, it's only the neighborhood pets that disappear.

Buy a trap, bait it, and carry the trapped foxes to Westminster, and loose them in the foyer of Commons. They'll find ample friends and relatives to begin a new life in the city (and planty of country retreats for which you've helped pay).