The BBC Radio 4 program "Great Lives" is a biography series produced in Bristol. It features a distinguished guest who selects a person they believe deserves the title "Great Life." The show includes a presenter and an expert, such as a biographer or family member, to discuss the nominated individual's life. Each episode is 28 minutes long and has undergone schedule changes throughout its broadcast history. The series has been hosted by various individuals, including Joan Bakewell, Humphrey Carpenter, Francine Stock, and currently Matthew Parris since April 2006. The provided text extensively lists the series' numerous installments from August 2001 through April 2025, detailing their broadcast periods. There is no information present about Rosalind Widdowson within this extract.