The Kipper Family used to do a wonderful wassailing song. Here's a snippet:

Wassail, Wassail I'll tell yer wassail,
It comes in bottles brown and pale,
It comes in bottles so bring some here
And we'll have a happy New Year

Here we come a-wassailing all amongst the leaves
Which isn't very easy when they're still all on the trees

Wassail etc.

Pouring cider on the apple tree seems rather wrong
We'll drink it first and then we'll water the trees before too long.

Wassail etc.