As in the other thread, I'll plug my own two songs - "Midwinter" and "Dance with the Dragon".

As to the English tradition, I suspect that quite a few Christmas songs are solstice songs masquerading .... a friend of mine whose family has preserved a lot of traditional lore (but whose family is not Christian) is very happy with the mythic child born at midwinter concept (hence my song)as this ties in with the stories they have always told about the sequence of the year.   Their stories do not connect at other Christian festivals, but the imagery is identical for Christmas and the solstice. This may not be "evidence", but my guess is that a number of the older pagan traditions were simply taken over by the whole Christmas bandwagon.

The oral trad is always difficult to pin down in terms of hard evidence, of course.

Anne