My brother-in-law, Harry Calvert, who has died aged 92, was a lecturer in socio-legal studies in Belfast, Newcastle and Cardiff.
While at Queen’s University Belfast, Harry wrote a key text on the study of devolved government, Constitutional Law in Northern Ireland (1968). He was later an influential adviser at the Sunningdale talks in 1973, identifying a legal base for the short-lived power-sharing executive, brought down in 1974. It was his recollection that the most stubborn participant at Sunningdale was the British prime minister, Edward Heath.
