ITV
From Tardis Wiki, the free Doctor Who reference
ITV (Independant Televison) was a broadcasting company in the 20th century onwards, it was the BBC's rival company and attracted large viewing figures.
History
Kathy Nightingale and Sally Sparrow discussed their own series of adventures known as "Sparrow and Nightingale", and suggested it air on ITV. (DW: Blink)
When the Doctor saved the Albert Hall from being blown up, one of the side effects noted was that ITV went off air. (SP: Doctor Who at the Proms)
