Warner Brothers (in-universe)
From Tardis Wiki, the free Doctor Who reference
Warner Brothers was a company that produced a cartoon with a character named Marvin the Martian. (PROSE: Oblivion) In 1947, some speculated that Star Light Pictures would become more powerful when Warner Brothers by 1950. (PROSE: Dying in the Sun)
Behind the scenes
Warner Bros. provided the post-production sound for Torchwood: Miracle Day.
They are also the parent company of Warner Video, which handled the North American distribution of Doctor Who and its spin-offs on home media from 2000 until 2016.
