I thank the hon. Gentleman; he has followed this subject for a long period and has experience and insight. We are worried, and our main concerns are around the humanitarian situation and the stability of northern Syria. Notwithstanding the removal of Daesh leader al-Baghdadi, which we welcome, we are worried about the medium-term impact on counter-Daesh strategy in the region. So while we welcome the ceasefire brokered by Vice-President Mike Pence in relation to northern Syria, we are also seeing an accommodation between the Syrian Democratic Forces and the Syrian regime and indeed Presidents Erdoğan and Putin, and that is counter both to our counter-terrorism efforts but also to the humanitarian plight that the hon. Gentleman rightly raises.