New Christmas repertoire for treble voices, for mixed choirs, for chorus and orchestra are all making their mark this year.  These include Anthony Bolton's homage to Britten - A Garland of Carols, The Manchester Carols a sequence by Carol Ann Duffy and Sasha Johnson Manning (now in versions for SATB, and SSA voices, with orchestra or chamber ensemble), plus other recent carols (from Vladimír Godár, Howard Goodall & Alexander L'Estrange).
 
Follow the links below for more information, sample pages and audio:
 
Anthony Bolton: A Garland of Carols (upper voices & harp)
Carol Ann Duffy & Sasha Johnson Mannning: The Manchester Carols (SSA or SATB voices, optional childrens' voices and chamber orchestra, or ensemble)
Carol Ann Duffy & Sasha Johnson Mannning: Mirabile Dictu (from 'The Manchester Carols') (SATB and piano)
Vladimír Godár: Dormi Jesu (SATB and piano/harp/harpsichord)
Howard Goodall: Stella quam viderant Magi (upper voices and orchestra, or ensemble)
Howard Goodall (arr.): The Angel Gabriel (upper voices and orchestra, or ensemble)
Howard Goodall (arr.): Veni, veni Emmanuel (upper voices and orchestra, or ensemble)
Howard Goodall (arr): Gaudete (upper voices and orchestra, or ensemble)
Howard Goodall: Enchanted Carols (SSA and piano/organ)
Alexander L'Estrange: Lute-Book Lullaby (SATB and organ)

For orchestral programmers, the following may be of interest:

Malcolm Arnold: The Song of Simeon (A Nativity Masque)
Benjamin Britten: Men of Goodwill (variations on God, Rest Ye Merry Gentlemen)
Carl Davis: The Most Wonderful Birthday of All (SATB chorus & orchestra)
Howard Goodall: Winter from "The Seasons" (cello & orchestra)
Kenneth Hesketh: Rumpole and Father Christmas (narrator & orchestra, after the short story by John Mortimer)
Nigel Hess: A Christmas Overture
Colin Matthews: La Virgen Lava Panales (voice & orchestra)