Blue Peter (in-universe)
From Tardis Wiki, the free Doctor Who reference
Blue Peter was a popular BBC television program for children, airing since 1958. In 2006, shortly after an alien ship crashed in the Thames, Blue Peter presenter Matt Baker did a feature on how to make an alien ship cake. (DW: Aliens of London)
Behind the Scenes
Blue Peter has had a lengthy relationship with Doctor Who, often running features on the show with appearances by the cast and crew.