Recapitulating the great migration of English agricultural workers to the cities of 100+ years ago, rural hedgehogs are now moving to suburbia. If you would like to keep Mrs. Tiggy-Winkle in your Fulking garden and discourage her from moving to Mile Oak, then you need to offer her some incentives. You could, for example, provide a hole in the fence that would allow her to enjoy the fine slugs that your neighbours breed on their lettuce patch. Or you (or your children) could even build her a house.