This breed is the progeny of the Scottish Blackface or Blackface X Swaledale ewe and the Blue Faced Leicester tup. The lambs resulting from this cross, renowned for their high vigour and good conformation, are produced on high lying farms in the Highland area.

Many of the farms have little land below 850 feet and experience extreme weather conditions. Their inherent vigour and hardiness from their Blackface mothers, means that they survive the harshness of their environment and grow quickly. However, it is when they go from Highland farms to low ground farms, they just mushroom in size - while still retaining their hardiness.

Many of the ewe lambs go to the tup as lambs and achieve more than 100% lambing rate themselves - boding well for their prolificacy in later years.