Hugh Richard Louis Grosvenor, 7th Duke of Westminster,, is a British aristocrat and billionaire businessman. He inherited his title and control of the Grosvenor Estate, then worth an estimated £9 billion, from his father in 2016. As such, Grosvenor is one of the wealthiest men in Britain. In 2023, Bloomberg estimated that he had a net worth of approximately £9.42 billion. He ranked eleventh on the 2023 Sunday Times Rich List with an estimated fortune of £9.878 billion.

David Charles Carnegie, 4th Duke of Fife is a British peer and businessman. He is the only surviving son of the late James Carnegie, 3rd Duke of Fife, and his former wife Caroline Dewar. He was styled Earl of Macduff until 1992, and then Earl of Southesk until succeeding his father on 22 June 2015 as the fourth Duke of Fife and Chief of the Clan Carnegie. He is the highest person in line of succession to the British throne who is not a descendant of George V. He is a third cousin of King Charles III.