Serena Belinda Rosemary Hamilton-Temple-Blackwood, Marchioness of Dufferin and Ava (néeGuinness; 25 March 1941 – 26 October 2020), also known as Lindy Guinness, was a British artist, conservationist and businesswoman. She was married to the fifth Marquess from 1964 until his death in 1988.
Sheridan was also an art enthusiast and opened a gallery in London. The Dufferins' Holland Park mansion was a popular gathering for London's "aristo-bohemian set" during the 1960s and 1970s. "We used to give endless parties," she told W magazine in 2009. "They had this kind of innocence and openness about them. There was no sort of formality." The marquess, who The Independent described as "flamboyant and basically homosexual", died of an AIDS-related illness in 1988.[6][10]
In his will, the marquess bequeathed Clandeboye, the 2,000-acre family estate in Bangor, County Down, Northern Ireland, to his widow. Nervous about moving to Northern Ireland during the Troubles, she became active in conservation issues as a way to bring people together. She invited an environmental group, BTCV (known as Conservation Volunteers Northern Ireland in the province), later renamed as The Conservation Volunteers, to open its first Northern Ireland branch. "I thought this was a way to bring the estate back to its historic position of being the centre of the community." The estate includes a large herd of heifers, and in 2009, Dufferin launched Clandeboye Estate Yoghurt, the only yoghurt producer in Northern Ireland.[11]
She also opened an art gallery, the Ava Gallery,[6] and kept the estate self-sufficient through various other enterprises, including a golf course and banquet hall for weddings.[1]