In December 1975, four members of one of the IRA’s deadliest units were chased by police through the streets of London before hiding out in a small flat owned by a middle-aged couple called John and Sheila Matthews. The resulting six-day siege was covered live on television and radio, and gripped Britain. It ended when Metropolitan Police negotiators persuaded the gunmen to leave the flat peacefully. In 2019, Simon Watts spoke to Steven Moysey who saw the siege unfold.

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(Photo: Police in action on Balcombe Street during the siege. Credit: Evening Standard/Hulton Archive/Getty Images)