Memorial Police Constable,Keith Palmer,George Medal,Westminster,London. 'Ultimate sacrifice' PC Palmer, 48, was stabbed to death by Khalid Masood on 22 March 2017 at the gates of the Palace of Westminster His award on the Civilian Gallantry List is for "confronting an armed terrorist to protect others and Parliament". The citation says: "His actions provided time for other officers to react and shoot and stop the assailant. "PC Palmer's bravery and professionalism unquestionably saved lives. PC Palmer did his duty. "In doing so he made the ultimate sacrifice."