Channel 4's chief executive Mark Thompson has joined the board of the Community Channel, the non-profit making television channel.
Thompson, who has also joined the board of the Community Channel's parent company The Media Trust, will help the group build its activities in the voluntary sector.
The Community Channel, which broadcasts for 12 hours a day on Sky Digital and is also on the DTT platform Freeview, is dedicated to social action and community issues.
Media trust chief executive Caroline Diehl said: "Mark's experience in television combined with his long-standing support for the work of the voluntary sector beings a unique mix of skills to the board of the Media Trust."Thompson added: "The Community Channel is television with obvious public purposes and the launch of the Freeview platform offers real opportunity to raise its public profile and extend both its reach and impact."