a pair were surrounded by a small herd of these little blackies, which were very restless and made it difficult to isolate the mums.
http://www.ansi.okstate.edu/breeds/cattle/whitepark/
I doubted you could get as pure black whatever you crossed the White Park with, but apparently they do sometimes 'throw back' to pure black
http://www.britannicrarebreeds.co.uk/breedinfo/cow_whitepark.php