Whatever happened to the Christmas Number One?

(L-R) Noddy Holder, Don Powell, Dave Hill and Jim Lea of Slade perform on a Christmas TV show in December 1973 in Hilversum, netherlands. (Photo by Gijsbert Hanekroot/Redferns)
(L-R) Noddy Holder, Don Powell, Dave Hill and Jim Lea of Slade perform on a Christmas TV show in December 1973 in Hilversum, netherlands. (Photo by Gijsbert Hanekroot/Redferns)