Kirsty Young's castaway this week is the historian, gardener and diarist Sir Roy Strong.

He stormed the establishment in the 1960s - a proto-meritocrat, in possession of a sharp mind, fizzing ambition and a brown velvet frock coat.

An avowedly unhappy and clever child he turned first to history and then art for stimulation and solace, setting down a template for a working life that would lead him to be the youngest ever director of the National Portrait Gallery and, later, to run the The Victoria and Albert Museum. Such early success left him with a fundamental problem - having fulfilled his wildest dreams by the age of 38 - what was he to do with the rest of his life? He would go on to publish his diaries and together with his wife Julia, created a garden at his home in Herefordshire, the Laskett.

Producer: Cathy Drysdale.