Sir Jeremy Greenstock, former UK Ambassador to the UN

HARDtalk's Zeinab Badawi speaks to Sir Jeremy Greenstock, former UK Ambassador to the UN, who was deeply involved in the decision-making process leading up to the Iraq War. He served as the UK's permanent representative in Iraq in the immediate aftermath of the invasion and gave evidence to the Chilcot inquiry which looked at the invasion and its consequences. With the benefit of hindsight would he have done anything differently?