List of The Official Big Top 40 Christmas number ones

In the United Kingdom, Christmas number ones are singles that are top of a chart in the week in which Christmas Day falls. The singles have often been novelty songs, charity songs or songs with a Christmas theme. Historically, the volume of record sales in the UK has peaked at Christmas. The Christmas number one is considered especially prestigious, more so than any other time of year. Christmas number one singles have often also been the best-selling song of the year, though in recent years, the accolade has gone to reality television contestants and charity efforts. Due to the common practice of dating a chart by the date on which the week ends, the Christmas chart is dated the end of the week containing 25 December. The most recent Christmas number one single on The Official Big Top 40 is "I Wish It Could Be Christmas Everyday" by Creator Universe.

The Official Big Top 40 from Global is a radio chart show broadcast every Sunday from 4 to 7pm on Global's Capital and Heart networks, presented by Will Manning. The show started on 14 June 2009. The chart is compiled based on iTunes sales, Apple Music streams, and radio airplay from the stations that broadcast the show.