Squadron leader a flying squadron is usually commanded by a wing commander, with each of the two flights under a squadron leader. However, ground-operating squadrons which are sub-divisions of a wing are ordinarily commanded by a squadron leader. This includes squadrons of the RAF Regiment and University Air Squadrons. The rank insignia consists of a thin blue band on a slightly wider black band between two narrow blue bands on slightly wider black bands. This is worn on both the lower sleeves of the tunic or on the shoulders of the flying suit or the casual uniform. Squadron leaders are the lowest
Structure of the Royal Air Force in 1989 air defence missile squadron. In 1989 the Royal Air Force was speedily replacing its aging Phantom fighters with the more modern and more capable Tornado F3, whose superior supersonic acceleration, powerful radar and beyond-visual-range missiles made it the ideal platform to intercept and destroy Soviet bombers attacking the UK. In case of war, No. 11 (Air Defence) Group would have taken command of the five UK-based Hawk T.1 training squadrons, which, armed with AIM-9L Sidewinder missiles would have become the last line of defense against Soviet air attacks. No. 18 (Maritime) Group was commanded by an Air Marshal based at