The Countess of Iveagh has split from the head of the Guinness family after 20 years of marriage in what could be one of Britain's biggest ever divorces. Reading-born interior designer Clare Hazell, 46, has filed for divorce from Edward Guinness, 51, who has a reputed fortune of more than £900million. She lives with her two teenage children at the Elveden Hall estate in Suffolk, which constitutes the biggest farm in the country and has played host to dramas including Netflix hit The Crown and the movie Eyes Wide Shut. A friend close to the Countess and Earl of Iveagh said: 'Clare and Ned were a great couple but she has been unhappy for several years and doesn't feel their marriage has been a priority for him for a long time.'