Background
McCausland was born in Drenagh, County Londonderry, the grandson of Street Andrew Street John, 15th Baron Street John of Bletso.
McCausland was born in Drenagh, County Londonderry, the grandson of Street Andrew Street John, 15th Baron Street John of Bletso.
He studied at Eton College and Trinity Hall, Cambridge, before becoming a magistrate. He was High Sheriff of County Londonderry in 1908, and in 1926, he was appointed as Lord Lieutenant of County Londonderry, serving until his death. In 1934, he was appointed to the Privy Council of Northern Ireland.