Getting humanitarian aid to Syrians trapped in besieged areas is one of our top priorities. Over 570,000 people remain in areas besieged by the Syrian regime. We have regular discussions with our international partners, including on methods for delivering humanitarian assistance to besieged populations in Syria. There are huge obstacles to carrying out airdrops, not least the risk to aircraft from regime air defences or terrorist groups. However, we rule nothing out and maintain every effort to help those in besieged areas. Most recently on 19 December we helped secure UN Security Council Resolution 2328 which demanded full access for the UN across Syria.