This week's castaway in Desert Island Discs is Henrietta, Marchioness of Tavistock. She'll be talking to Sue Lawley about, amongst other things, her idyllic childhood, her passion for breeding horses and explaining why she initially refused to live with her husband in his family's ancestral home, Woburn Abbey.

Favourite track: Cavalleria Rusticana Intermezzo by Pietro Mascagni