The Idlib area in northern Syria is now fully ruled by Hayat Tahrir al-Sham (HTS), a jihadist organisation dominated by members of Al-Qaeda’s former affiliate. How was this de-facto “emirate” allowed to consolidate and what consequences could it have for the nearly eight-year-old Syrian conflict and its main protagonists? A deal was struck between rebel-backer Turkey and Damascus ally Russia in September to stave off a threatened government offensive on Idlib.