After leaving school in the late 1970s, Arnold got her first TV jobs as a dancer on shows that included Top of the Pops. She first came to prominence as an actor and television presenter alongside Sandi Toksvig, Nick Staverson and Neil Buchanan in the 1980s children's television show No.
Following her graduation from school in the late 1970s, Arnold began her TV career by dancing on shows like Top of the Pops. She later became well-known as an actor and television presenter alongside Sandi Toksvig, Nick Staverson, and Neil Buchanan in the children's show No during the 1980s.