April 30th, 1980. The Wednesday morning sun glistening against the white washed walls of the Iranian Embassy overlooking Hyde Park.
Spring blossoms lined the quaint street, the most beautiful time of the year in the prestigious neighbourhood.
Police Constable Trevor Lock stood guard outside the South Kensington embassy. Iranian tourists made their way in through the gates, planning their trips home. BBC employees, Sim Harris and Chris Kramer stopped by to pick up their visas.
A regular Wednesday morning. No-one saw what was coming.