Complex sentence: It held the UK Christmas Number One slot in December 1973, beating Wizzard's "I Wish It Could Be Christmas Everyday" into fourth place, and was still at number one by mid-January; it stayed in the UK Singles Chart well into February 1974.
Split into simpler sentences: It held the UK Christmas Number One slot in December 1973, beating Wizzard's "I Wish It Could Be Christmas Everyday" into fourth place. By mid-January it was still at number one; it stayed in the UK Singles Chart well into February 1974.