The United Kingdom participated in the Junior Eurovision Song Contest 2023, which was held on 26 November 2023 in Nice, France. National broadcaster BBC was responsible for their participation and selected the nation's song and artist by internal selection. Stand Uniqu3, a girl group specially formed by the BBC following auditions, were selected to represent the United Kingdom with the song "Back to Life", written and composed by Sky Adams, Jakke Erixson and Jack Hawitt.

The Junior Eurovision Song Contest 2023 was the 21st edition of the Junior Eurovision Song Contest, organised by the European Broadcasting Union (EBU) and host broadcaster France Télévisions. The contest took place on 26 November 2023 at the Palais Nikaïa in Nice, France, following the country's victory at the 2022 contest with the song "Oh Maman !" by Lissandro. This was the second time that France hosted the Junior Eurovision Song Contest, the first being in Paris in 2021.