Feature-length special telling the inside story of an armed siege in a Bedford tower block, and including unprecedented access to the command suite during a live siege. A man rings 999 to report that he's seen a man with a weapon that looks like an AK-47 rifle shouting that he'll shoot the next person who he sees in the head. The call has come from a block of flats where two men have already blockaded themselves in a flat. As one of the men inside begins posting live on Facebook, armed officers are ordered to surround the building.