Baa Baa Brown Sheep

I have been trying to take photos of these sheep for a while and I either had another Blip for the day or they were too far away in the field. I went to the field today and they were gone, but further down the road I spotted these two in a field with normal sheep, so blipped them while I still had chance.
I thought I was told they were Swaleables (but probably misheard) on looking up the nearest I could find was Zwartbles but may be completely wrong.

Anyone know?