It's Bigger on the Inside (in-universe)
From Tardis Wiki, the free Doctor Who reference
It's Bigger on the Inside was a book that had been published by 1974. Somebody walking outside the BBC Television Centre was reading it when a plethora of scripts were thrown out of a window because of their redundancy now that Tom Baker was the new Doctor. (NOTVALID: Ever Wondered What Happened At.. The Auditions For The Seven Doctors?)
Behind the scenes[[edit] | [edit source]]
The title of the book, referencing the Tim Quinn and Dicky Howett book It's Bigger on the Inside!, makes an appearance here in a similar vein to the cameos of The Doctor Who Fun Book which also referenced an earlier work by the duo.