Entrepreneur Dame Stephanie Shirley joins Kirsty Young on Desert Island Discs.

As a child, she escaped Nazi Germany on the Kindertransport - travelling across Europe for two days in a train with a thousand children and just two adults. She went on to set up a computer programming company which made her a millionaire many times over. But she has given away most of her fortune and now is an ambassador for philanthropy. Her determination throughout it all, she says, has been to prove that hers was a life worth saving.

Record: Mozart- Sonata in C, K. 545