The Benny Hill Theme

Clara Oswald added a piece of music she called "The Benny Hill Theme" to a video of the Mire being defeated in a Viking village. (TV: The Girl Who Died)

Behind the scenes
Like Clara, many people in the UK often refer to the music as "The Benny Hill Theme", due to its use as the theme tune for The Benny Hill Show. In reality, the piece is titled "Yakety Sax" and was first performed by American saxophone player Boots Randolph in 1963.