Lord Dunboyne - Telegraph Yet the same volubility made him a formidable opponent, and in later life he led a tireless campaign for a review of standards in the National Health Service, following the death of his eldest daughter while she was receiving psychiatric treatment at a London hospital in 2006. When the case came before an inquest, a narrative verdict recorded that there had been no proper risk assessment of her condition, and that notes of her early treatment had not been consulted. Determined that such a tragedy must never repeat itself, the Dunboynes set out to redress the failings in her care and make their evidence public. In 2011, after many months of exhaustive work, Lord Dunboyne submitted a proposal to the House of Commons calling for an NHS Independent Complaints Commission that could conduct transparent investigation of all serious incidents. John Fitzwalter Butler was born on July 31 1951, the son of Patrick Butler, 28th Lord Dunboyne, and Anne Marie Mallet, daughter of the British Ambassador in Rome. His father was a circuit judge, while his grandfather had been a captain in the Royal Navy. Their Anglo-Irish family was descended from the 1st Lord of Dunboyne, who received a writ of summons to the Irish parliament in 1324. Succeeding generations were called to parliament intermittently until the Barony of Dunboyne was created by patent in 1541. The title passed to John's branch of the family when the 22nd Lord Dunboyne, who had been Bishop of Cork, died in 1800 without a male heir. John Dunboyne attended Ashdown House - where he was captain of the Dowagers football team, created by the headmaster for boys with no inclination towards competitive sport - and Winchester. A spirited disregard for authority meant that his departure after A-levels was the occasion for some relief on all sides, and he took advantage of his new-found freedom, heading to Kenya for three months. There he fell in love with African lore and wildlife, showing the same attitude towards hyenas and pi dogs as he did to the rest of life's opponents, whom he met with a stentorian voice and unassailable self-belief. On his return he won a place at Trinity College, Cambridge, graduating with an MA in Geography and Natural Sciences. Following the example of his father, whose passion for genealogy had led him to found the Butler Society in 1967, Dunboyne served on the committee of the Irish Peers Association, and was himself a vice-president of the Butler Society. In 1997 he established the society's website, latterly overseeing the digitalisation of the family tree, which was completed in the week before his death. Lord Dunboyne married, in 1975, Diana Caroline Williams. He is survived by her, his two daughters and a son, Richard Pierce Theobald Butler, born in 1983, who succeeds to the peerage. The 29th Lord Dunboyne, born July 31 1951, died July 11 2013