been mediated by qatar, 13 israeli hostages are due to be released later today, with 50 being released over the four days. as part of the agreement, israel will release 150 palestinian prisoners. sir stephen o brien is a former un under secretary general for humanitarian affairs and emergency relief coordinator. hejoins me now. tell us what has been happening at the border and how difficult it is been for some of these eight trucks to get through. how long they have been there, how long the jets were. you are in a hot part of the world so it has been a long, arduous time for people to be waiting but there has been plenty of time for assessments by the professionals, not least for the unh wr, to which i used to run, which has been really active in making sure there is a real assessment for the people, particularly in south casa, where they have been gathering to have the humanitarian supplies distributed to them to help them survive and maintain some kind of ability to give th