the north side of the enclosure on Horse Guards Parade and the new guard on the south side. As the new guard arrives, each guard carries the standard and the trumpeters of both old and new guards sound the royal salute on the arrival of the new guard and the departure of the old guard. When both guards have formed up in the enclosure, the corporal major, senior NCO and sentries of the first relief of the new guard leave for the guard room, which is then handed over. The sentries of the old guard, after being relieved, rejoin the remainder of the old guard on the north side of the enclosure. The standard and trumpeters are only on parade with a long guard. Procedure while at post A sentry will be on duty "at their post" for two hours. Every 10 minutes, he comes to attention, slopes arms and does a march of 15 paces across the area of the post. Each sentry does this four to five times before halting. He then shoulders arms and stands at ease. 'Standing easy' is not permitted whilst a sentry is at their post. Orders for sentry duty read out before each two-hour 'tour of duty', make it clear that sentries "may not eat, sleep, smoke, stand easy, sit or lie down during [their] tour of duty". Sentries receive instruction on how to eliminate nuisance or any suggestion of threat from members of the public. There is a protocol they follow which begins with "stamping" (coming to attention sharply). He will also shout: "Stand back from the King's Guard" or similar. If this does not eliminate the nuisance or threat he will repeat the stamp and shout again. If the nuisance or threat still does not cease the sentry will assume the position of "port arms" whereby he points his rifle at the source of the interference. If these warnings are not heeded the sentry then has the choice of detaining the person(s) himself or pressing the button in his sentry box to summon assistance. If a person steps in front of a sentry while he is marching he will shout: "Make way for the King's Guard!". Discipline Although the guards were previously 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