What was St Francis's role in the history of Christmas? And what do the three ships in the carol of the same name have to do with the story of Christ? In today's programme Sir Geraint looks across the Channel to see how carols that started as 'Noels' in Europe turn out to be among the most popular sung in Britain today. Today's carols: '0 come, 0 come, Emmanuel' 'In dulci jubilo' 'I saw three ships' 'II est n6 Ie divin enfant' 'Orientis partibus'