Over at Binnall of America, Richard Thomas delves deep into the controversial world of the British big-cat, or the Alien Big Cat (ABC). As he says in part:
"One of these I've always found interesting, is the idea that some of the exotic animals the Romans may have brought here to use in their amphitheatres could have escaped or even been let go into the wild. If not the Romans, maybe the ABCs originate from the Victorians. They also kept exotic pets and used big cats in their circuses. Another theory that has always intrigued me is the idea that the ABCs might not be 'Alien' at all but instead an unidentified species of big cat native to Britain, perhaps survivors from the prehistoric past. Fossil evidence indicates that the lynx survived in Britain until at least 1,500 years ago, its extinction due to human activity rather than environmental changes. Maybe in more remote areas, like parts of Wales, some managed to survive into modern times."
Here's the link to the rest of Richard's article.