You can have feral cats anywhere and they are not related to wildcats.

When Chatham Dockyard was a working Naval dockyard it had a huge population of feral cats that lived under the gratings where the steam pipes ran through. They had the best of food as they rummaged in the skips provided for waste food, RN ships were not allowed to ditch waste in the water as it was non tidal.

Woe betide any drunken sailor who tried to pet one, a visit to the sick-bay was usually the consequence.