Kirsty Young's castaway is the designer Cath Kidston.
Cheerful and practical, her products nod towards the 1950s. She began with ironing board covers but these days you can listen to a radio decorated with one of her designs, pitch one of her tents or decorate the children's bedroom with her cowboy wallpaper.
In her own room as a child she used to play at keeping shop. These days her business has a turnover of more than £50 million. "I really felt, from very, very early on, I was onto something with the notion of what I was doing," she says. "I remember feeling I'd really overstepped the mark when I opened my second shop - thinking, that's probably going a stage too far."
Record: Always Look on the Bright Side of Life Book: The Larousse French/English dictionary Luxury: A hot water bottle
Producer: Isabel Sargent.