The Zwartbles is a breed of domestic sheep originating in the Friesland region of the north Netherlands. There it was primarily used for the production of sheep milk as well as lamb and mutton. They were often kept alongside dairy cattle herds (Wikipedia, April 2014). 

Came across 3 of them yesterday, before retreating from the rain whilst trying to walk to the town from a very rural higher educational institution, Newport, Shropshire, England.