Beauclerk attended Tonbridge School in Kent, before qualifying as a Chartered Accountant in 1962.

[1] Since 1989, he has served as Governor-General of the Royal Stuart Society,[2] a monarchist organization with Jacobite ties, and is also a Freeman of the City of London and Liveryman of the Drapers' Company.

They were divorced in 1974, having had two children: In 1975, Rosemary Beauclerk remarried to Paul Pellew, 10th Viscount Exmouth, 9th Marquess of Olías.

[3][4] On 29 August 1974, shortly after his first divorce, Beauclerk married secondly Cynthia Theresa Mary (1929–2002), daughter of Lt-Col. William James Holdsworth Howard and former wife of the late Sir Anthony Robin Hooper, 2nd Baronet.

The Duke married his third and current wife, Gillian Anita Northam, on 14 December 2002 in London.