As the Taliban closed in on Kabul, and Western troops and desperate Afghans scrambled to leave, Britain found itself frozen out of decision making and incapable of influencing events. It was a stark illustration of the UK’s status, made worse by catastrophic misjudgements at the top of government. In this two-part Slow Newscast, Matthew d’Ancona investigates what was happening in Westminster and Whitehall as the West abandoned the country it had liberated 20 years before.