If a person or persons step in front of a sentry while he is marching he will shout : " Make way for the Queen 's Guard ! " ( or Castle guard/Tower of London guard/Windsor Castle guard , etc. ) Although formerly the guards were able to be positioned among the public , in recent times , more and more of the sentry posts have been moved away from the public because of incidents involving tourists interfering with the guards ' job . Most recently , ropes were installed between the sentry posts at Windsor Castle and the public after an incident occurred between a sentry and a tourist who was mocking him , pretending to march alongside him and eventually grabbing the shoulder on which his rifle was resting . In London , the only open sentry posts remaining not usually behind any sort of fence were those at the Pall Mall entrance to St James 's Palace ( although when the Prince of Wales took up residence at Clarence House , the sentries were moved outside the gate ) ; however , in December 2014 , the Pall Mall sentries were moved to Friary Court inside the walls of the palace , while the Clarence House sentries repositioned inside the fence and at the entrance to the gardens . This was as a result of the increased threat of so-called " lone wolf " terrorist attacks , particularly following the murder of a British soldier in Woolwich , and the terrorist attack on the Canadian Parliament
murder of a British soldier in Woolwich
Murder of Lee Rigby
Queen's Guard