Britannia High was a short-lived UK TV series, a scripted musical drama (similar to Fame and Glee). Young performers endured a grueling audition process for six roles (3 males, 3 females). Pixie Lott was one of the young hopefuls, and she was featured in the behind the scenes documentary.
Ed Sheeran was also here, and his moments are in another video on my channel. (There are two Ed clips here that I overlooked in that video.)
Matthew James Thomas went on to play Jez in the 9 Britannia High episodes and then to star in Pippin on Broadway.
Please, NO disrespect in the comments to any of the young performers.