Belle and Sebastian first recorded ‘O Come, O Come Emmanuel’ for the 2000 XFM (now Radio X) compilation It’s A Cool, Cool Christmas. They later recorded it for a Christmas session for John Peel in 2002.
I post these for interest, too…
I’m not entirely sure about B&S doing jazz, but why not? From the Peel session
I have to confess that this had been forgotten by me…but it is rather sweet. Their 2007 Christmas single ‘Are You Coming Over For Christmas?’
Finally another track from the Peel session
You can listen to the entire 16 (!) song session here