the 105th Regiment Royal Artillery. Although the gun is no longer required for its original purpose, the ceremony has become a popular tourist attraction. The longest-serving District Gunner, Staff Sergeant Thomas McKay MBE, nicknamed "Tam the Gun", fired the One O'Clock Gun from 1979 until his retirement in January 2005. McKay helped establish the One O'Clock Gun Association, which opened a small exhibition at Mill's Mount, and published a book entitled What Time Does Edinburgh's One O'clock Gun Fire? In 2006 Sergeant Jamie Shannon, nicknamed "Shannon the Cannon", became the 29th District Gunner, and in 2006 Bombardier Allison Jones became the first woman to fire the gun. Symbol of Edinburgh The castle has become a recognisable symbol of Edinburgh, and of Scotland. It appears, in stylised form, on the coats of arms of the City of Edinburgh and the University of Edinburgh. It also features on the badge of No. 603 (City of Edinburgh) Squadron which was based at RAF Turnhouse (now Edinburgh Airport) during Second World War. Images of the castle are used as a logo by organisations including Edinburgh Rugby, the Edinburgh Evening News, Hibernian F.C. and the Edinburgh Marathon. It also appears on the "Castle series" of Royal Mail postage stamps, and has been represented on various issues of banknotes issued by Scottish clearing banks. In the 1960s the castle was illustrated on £5 notes issued by the National Commercial Bank of Scotland, and since 1987 it has featured on the reverse of £1 notes issued by the Royal Bank of Scotland. Since 2009 the castle, as part of Edinburgh's World Heritage Site, has appeared on £10 notes issued by the Clydesdale Bank. The castle is a focal point for annual fireworks displays which mark Edinburgh's Hogmanay (new year) celebrations, and the end of the Edinburgh Festival in the summer. See also Banknotes of Scotland (featured on design) List of Governors of Edinburgh Castle List of castles in Scotland Military of Scotland History of Edinburgh Stone of Scone Notes Bibliography External links Bess Rhodes, Edinburgh Castle Research: The Tournaments (Historic Environment Scotland, 2019). Arkady Hodge, Edinburgh Castle Research: The Medieval Documents (Historic Environment Scotland, 2019). Scottish National War Memorial website Edinburgh Castle, Royal Commission on the Ancient and Historical Monuments of Scotland "Canmore" database Images of Edinburgh Castle from the Royal Commission on the Ancient and Historical Monuments of Scotland Engraving of view of the North East