2/3. At the height of Northern Ireland's conflict in the 1970s, Vanguard rallied Unionists against direct rule from Westminster and opposed power-sharing, but split when its leader, William Craig , called for coalition with the nationalist SDLP. Shaun Ley continues his series on short-lived political parties, with contributions from former Vanguard member David Trimble , who later became Northern Ireland First Minister.
Producer Rob Shepherd Repeated from Sunday at 10.45pm