This document discusses choosing a radio station to release a radio trailer for a documentary. It chooses Capital radio, which is based in Birmingham and began broadcasting in 1995. Although the documentary will air on Channel 4, Capital radio is a better fit than Channel 4 radio as it appeals more to the target 16-24 age range. Channel 4 and its sister stations also feature educational and entertainment programs that align with the topic of the documentary about mobile phones. While the trailer won't air on Channel 4 radio, researching Channel 4's audience was useful for targeting the right demographic.