A still from the Helensburgh Big Cat Video

An off-duty Ministry of Defence police dog handler has taken a video of what he claims is a panther-sized big cat.

Pc Chris Swallow was helping a friend with their garden in Helensburgh, Argyll, when he spotted the black creature on a nearby railway line.

The officer, who is stationed at the Faslane naval base on the Clyde, said the cat was as big as a Labrador dog.

Big cats have been reported in the area in the past, with several sightings of the so-called Coulport Cougar.

Pc Swallow said he saw the animal on 30 June while working in the garden at Kildonan Drive, Helensburgh.

He could tell it was not a Labrador, as he first thought, because of the way it was walking, and because its tail was about twice the length that a dog’s would have been.

Source, more information and the Video can be found on the BBC website:
Policeman takes ‘big cat’ video.