This is what we found on Wikipedia regarding the Strictly Come Dancing:

Strictly Come Dancing (commonly referred to as Strictly) is a British dance contest show in which celebrities partner with professional dancers to compete in mainly ballroom and Latin dance. Each couple is scored by a panel of judges. The title of the show is a continuation of the long-running series Come Dancing. The format has been exported to 60 other countries under the title Dancing with the Stars, licensed by BBC Worldwide, and led to a modern dance-themed spin-off Strictly Dance Fever. The Guinness World Records named Strictly as the world's most successful reality television format in 2010. The series is currently presented by Tess Daly and Claudia Winkleman. Bruce Forsyth co-presented the series with Daly until 2013, returning for special episodes until November 2015.

The series has been broadcast on BBC One since 15 May 2004, typically on Saturday evenings with a following Sunday night results show. From series 2 onwards, the show has been broadcast in the run up to Christmas. With its high viewing figures, Strictly Come Dancing has become a significant programme for dancing on British television. Eighteen stand-alone Christmas specials and nineteen charity specials have also been produced.