Last year, a London group called Zazous & The Furys recorded the song as a charity single, attempting to raise money for Shelter, a UK group that works to alleviate the homelessness problem in Great Britain. Shelter helps the homeless find and keep homes, provides assistance to others, and campaigns for decent housing for all.
There's not much of a digital footprint for these cats. They appear to have been put together by London musician and producer Craig Catling, who doesn't have much of a digital footprint himself. There's a Soundcloud page for a Craig Catling, but I can't say that they're the same dude, as there are no identifiers there. I will say it's pretty good stuff (albeit of the non-holiday variety).
Zazous & The Furys recorded the single, placed it everywhere, and played a bunch of gigs for it...but that was that. There's been no follow-up and their Facebook page has expired. And they weren't really trying to sell anything, they were trying to raise awareness and money for Shelter. The pitch was simple enough: listen to the single, make a donation.
The fundraising page is still open. But my ask, this year, would be slightly different. If you can and if you feel inclined, make a donation to a charity near you dealing with homelessness in your locale. I think that would be a proper way to pay respect to Zazous & The Furys for this fine cover of "My Christmas Prayer", which is absolutely free at CD Baby.