When doing a pest control job round the lakes, a fox did pick up 2 rats, It was sat just at the back of a rat hole and got them when they stuck their heads out. Don't know about urban though as we don't get them in the village.Would a fox catch and kill a rat ?
Can’t says there is any urban foxes around my way.
That's probably because they get treated as vermin out of the cities and get shotWhen we lived in Barnes, in London, I would see a few almost everyday, especially on earlies or nights. Since moving out of London 20 years ago, I have seen 3. Two when I used to get the the 5:45 train into work, both walking along the track. and one crossing the road in front of the car last week.