Several Christmas Carols (also found in hymnbooks):

O Little Town of Bethlehem - Forest Green Cyberhymnal page here

O Sing a Song of Bethlehem - Kingsfold Cyberhymnal page here.

On Christmas Night All Christians Sing - Sussex Carol Cyberhymnal page here

(I like Ralph Vaughan Williams too! Actually you can search any hymnbook or the Cyberhymnal for the tune names listed above. I think there are 5 hymns for each of the first two tunes listed above. I always read hymnals when I go to funerals and weddings at churches other than my own. The Episcopal Church seems to have at least twice as many RVW tunes as other Protestant churches. I suspect churches in England have even more.)

Continuing on...

When Christmas Morn is Dawning - Wir hatten gebaut - Mudcat thread here.

The Friendly Beasts - Orientis Partibus - Mudcat thread here.

Away in a Manger - Flow Gently Sweet Afton (mentioned above).