guards' job, as well as incidents where the guards have had to discipline tourists for disrespectful or dangerous behaviour. In 2012, footage of a tourist disrespecting the guards went viral, in which a Russian tourist refused to stop their attempt at climbing the Buckingham Palace fence despite the guard aiming his SA80 rifle at the would-be intruder. 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 sentry posts most recently remaining not behind any sort of fence were those at the Pall Mall entrance to St James's Palace. 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 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. Arms plot Battalions on public duties were part of the regular arms plot, a system where infantry battalions were periodically rotated to various locations and different roles. Following the restructuring of the army announced in 2006, the arms plot system ceased – infantry battalions have now been given fixed roles and locations. In theory, this includes public duties in London, which will retain its two guards and one-line infantry battalion. However, for some postings, including public duties, light role infantry battalions will continue to rotate. In the case of public duties in London, the four Guards battalions will rotate every two years, while the line infantry battalion will rotate with battalions assigned to 52 Infantry Brigade and British Forces Cyprus. This has changed following the implementation of the Army 2020 plan. Personnel King's Guards Postings for the King's Guard are usually formed from one of the five regiments of foot guards: The Grenadier Guards The Coldstream Guards The Scots Guards The Irish Guards The Welsh Guards In addition, the RAF Regiment takes over the guard for around three weeks per year. The King's Colour Squadron is the RAF Regiment's dedicated ceremonial unit for this task. The King's Colour Squadron represents the whole Royal Air Force as the