THINGS WE DIDN'T KNOW WE DIDN'T KNOW: We'd always known that Dawn Chorus - who did a throwaway and not unpleasant version of Teenage Kicks - was in a large part Liz Kershaw; back in the days before she was a Radio Star; even before her brother was a radio star, come to that. What we didn't know until this week was that one of Andy Kershaw's girlfriends was also in the line-up. Scarily, that girlfriend went on to be Carol Vorderman. Add those thoughts up. And be scared.