Doesn't that sort of depend on the channel? eg Radio 1 has always been Obnoxiously! Trendy! Pop! Music!, Radio 2 a lightweight blend of news, musical standards, and entertainment, Radio 3 classical or music and Very Serious Discourse, and Radio 4 intellectual topics, politics, and and quality news, little or no music. I know there are a few other radio channels but I can't remember what their focus is. And of course all of these channels have variations of their own depending what time of the day/week people are listening.