 On 10 October 2008 , Channel 4 announced that it would pull out of the 4 Digital Group consortium , that it would not launch services on the second national multiplex , and that it would axe its three digital radio services , E4 Radio , Channel 4 Radio and Pure 4 . Channel 4 chief executive Andy Duncan admitted that ending Channel 4 's foray into digital radio could cost the corporation £ 9 million . 
