NEW BOOK: Anne Glenconner has been close to the Royal Family since childhood. Eldest child of the 5th Earl of Leicester, she was, as a daughter, described as 'the greatest disappointment' by her family as she was unable to inherit. Her childhood home Holkham Hall is one of the grandest estates in England. Bordering Sandringham the Princesses Elizabeth and Margaret were frequent playmates.

From Maid of Honour at the Queen's Coronation to Lady in Waiting to Princess Margaret, Lady Glenconner is a unique witness to royal history, as well as an extraordinary survivor of a generation of aristocratic women trapped without inheritance and burdened with social expectations.

She married the charismatic but highly volatile Colin Tennant, Lord Glenconner, who became the owner of Mustique. Together they turned the island into a paradise for the rich and famous, including Mick Jagger and David Bowie, and it became a favourite retreat for Princess Margaret.

But beneath the glitz and glamour there has also lurked tragedy. On Lord Glenconner's death in 2010 he left his fortune to a former employee. And of their five children, two grown-up sons died, while a third son had to be nursed back from a coma by Anne, after having suffered a near fatal accident.

Anne Glenconner writes with extraordinary wit, generosity and courage and she exposes what life was like in her gilded cage, revealing the role of her great friendship with Princess Margaret, and the freedom she can now finally enjoy in later life.