London Tower Fire: Britain's Shame

The fire that's believed to have started on the 4th floor of Grenfell Tower engulfed almost the entire 24-storey building at shocking speed. Firefighters battling the inferno say they've never seen anything like it before. Why were the fears of residents about fire safety apparently ignored and why did the flames rip so quickly through their council tower block? Richard Bilton investigates what happened that terrible night, and the grief and anger about one of Britain's worst fire disasters in living memory in one of its richest boroughs.