The Scottish Wildcat is a definite species of cat. They are rare in the wild, but there are some in captivity. I saw one a couple of years ago when I visited the New Forest Wildlife Park.

There were persistent reports of a Panther in County Durham some years ago but I have not heard anything recently so it has either died or never existed. Although there is good reason to be skeptical about some of the reports of big cats in the wild in the UK, they cannot be completely discounted. The reports keep cropping up and tend to be persistent, which suggest there is likely something in them.

There are wallabies living in Derbyshire. They were released from a private zoo in the 1930's and have continued to survive. There is a report of a sighting this year on this site:

http://www.roaches.org.uk/wallabies.htm