History

the origins of the British shorthair most likely date back to the first century AD, making it one of the most ancient identifiable cat breeds in the world. these cats were imported by the romans who kept them to keep the camps clear of snakes, mice and insects. 

these cats then interbred with the local European wildcat population. over the centuries, their naturally isolated descendants developed into distinctively large, robust cats with a short but very thick coat, to better withstand conditions on their native islands. based on artists representations, the modern British shorthair is unchanged from this initial type 

Descriptions

the British Shorthair is a relatively powerful-looking large cat, having a broad chest, strong thick-set legs with rounded paws and a medium-length, blunt-tipped tail. The head is relatively large and rounded, with a short muzzle, broad cheeks and large round eyes that are deep coppery orange in the British Blue. They are slow to mature in comparison with most cat breeds. Unusually among domestic cats they are a noticeably sexually dimorphic breed, with males averaging 9-17lb and  females 7-12lb.

Temperament

they tend to be safe around other pets and children since they will tolerate a fair  amount of physical interaction. Take well to being kept as indoor only cats.

Info provided at Wikipedia