Gaudete - Steeleye Span ( a nice bit of Latin. That is what an All Saints education in the 70s does for you).
Fairytale of New York - Pogues favourite band of all time captures that bitter sweet element of relatonships
Mediaeval Baebes - Adam Lay Ibounden a nice bit of middle English with a great Beat
I believe in Father Christmas - Greg Lake i love the start with the music ( Bells) from Lieutenant Kije.
Christmas Wrapping- The Waitresses. A nice song about the loneliness of christmas with a happy ending.
Silent Night. The definitive Hymn for Christmas. So atmospheric partcularly in a candle lit church.