A short comprehensive review, the title says it all 'British Jihadis in Iraq and Syria: How should we deal with them when they come home?', in The Independent (UK) newspaper:http://www.independent.co.uk/news/uk...e-9771290.html

The sub-title explains more 'While there is broad consensus that those who pose a threat to national security should be dealt with, many experts argue that not all of the Britons in Syria and Iraq are trained fighters and terrorists'.

Here is one passage on the dilemma for the state:
Worryingly, the government strategy for dealing with returnees appears generalised, untargeted, fragmented and draconian. ...But it is feared that such measures will serve only to send the more moderate returnees, who might otherwise become assets for intelligence services, underground.
For reasons lost on me the UK's 'Prevent' strategy and the cited Channel Project are often praised by officialdom and those abroad. Sadly it has very little credibility where it matters, which is not inside government, but amongst those who need help - not exclusively Muslims either.