Seriously pal. These animals do more good than harm IN YOUR GARDEN. I accept they steal eggs in the laying season, but the good they do, removing slugs and other small insects in the garden is superb.
If you can put up with them, and your livelyhood, doesn't hang in the balance with their existence, leave them be.
the reason i want them gone is because the dogs bark when they're in the garden,it's all flagged anyway so f**k knows why they want to come here.