A C4 report based on two British citizens who went to Syria and have returned. There are is a film clip using two interviews, with some footage on the conflict and a less valuable studio session with experts:http://www.channel4.com/news/syria-b...-sham-fighters

One expert, Lord West, a former security minister, rightly points out there are two waves of those going to Syria; before Daesh and after Daesh. The hundreds (up to 250) who have returned I'd expect them to be overwhelmingly before Daesh.