I think it’s only a matter of time before a fox kills a baby or young child, We’ve already had a few attacks. When I was a kid (40 years ago) foxes where nocturnal creatures and quite timing. Now they wander around in broad daylight, are generally not bothered by people or most dogs. Their behaviour is changing and there is a reason farmers hate them, they kill for fun, not just to eat. Saw one in central London outside my flat a few weeks ago, wandering around in brad daylight. I would be quite surprised if they eat many mice or rats, our careless piling on rubbish on the streets gives them enough free food.