The Festival of Nine Lessons and Carols was first held on Christmas Eve 1918. It was planned by Eric Milner-White, who, at the age of thirty-four, had just been appointed Dean of King’s College in Cambridge, England.  A revision of the Order of Service was made in 1919, involving rearrangement of the lessons, and from that date the service has always begun with the hymn ‘Once in Royal David’s City’.

The original service was, in fact, adapted from an Order drawn up by E. W. Benson, later Archbishop of Canterbury, for use in the wooden shed, which then served as his cathedral in Truro, at 10 p.m. on Christmas Eve 1880. A. C. Benson recalled: ‘My father arranged from ancient sources a little service for Christmas Eve – nine carols and nine tiny lessons, which were read by various officers of the Church, beginning with a chorister, and ending, through the different grades, with the Bishop’. The idea had come from G. H. S. Walpole, later Bishop of Edinburgh. Almost immediately, other churches adapted the service for their own use. A wider frame began to grow when the service was first broadcast in 1928 and, with the exception of 1930, it has been broadcast annually, even during the Second World War, when the ancient glass (and also all heat) had been removed from the Chapel.

Wherever the service is heard and however it is adapted, whether the music is provided by choir or congregation, the pattern and strength of the service, as Dean Milner-White pointed out, derive from the lessons and not the music. ‘The main theme is the development of the loving purposes of God …’ seen ‘through the windows and the words of the Bible.’