For the christmas edition of the programme, Roy Jenkins looks at the enduring appeal of the traditional carol service. Attendances at other times of year may be down but carol services appear to be growing in popularity - and not only in churches and chapels. What’s behind their enduring appeal? Why do people turn up and sing their hearts out? And how much does faith play a part? Taking part in the programme are: St Fagan's Museum of Welsh Life Bargoed Salvation Army Band Graham Kendrick The Clink Restaurant, Cardiff and Ebeneser Chapel, Cardiff The Dean of Brecon 160th (Welsh) Brigade Victory Church, Cwmbran