‘I smuggled jihadists into Syria’
1 September 2014 Last updated at 22:31 BST
UK Prime Minister David Cameron has said new powers were needed to seize terrorist suspects' passports and stop British-born extremists from returning to the UK.
It is thought hundreds of Britons have already made the journey into Syria with many going through Turkey.
The Turkish authorities say they have tightened their own border restrictions.
Ian Pannell reports from Turkey's border with Syria on the traffic in jihadist trainees.