Radio 4 is marking Friday 12th as “Just One Thing Day” in celebration of Dr Michael Mosley’s life and legacy. Throughout the week, we’ve asked his friends and colleagues to tell us what change they might have made that was down to him. Speaking to Today’s Justin Webb, Dr Clare Bailey Mosley shares touching tributes, and reflects on his work, influence, and legacy. Listen to the Today programme on Radio 4 and BBC Sounds: 6-9am Monday-Friday; and 7-9am on Saturdays.