Squadron Leader is a military rank and appointment that is used in the Royal Air Force (RAF) and other air forces. The rank is equivalent to a major in the British Army and the Royal Marines, and a lieutenant commander in the Royal Navy. It is a senior non-commissioned officer rank, but can also be held by commissioned officers.
The supplied evidence is an obituary for Squadron Leader Graham Laurie, a pilot who flew for Prince Charles. The obituary does not provide information on the typical responsibilities or duties of a Squadron Leader, but it does confirm that Graham Laurie held the rank.
The obituary does not provide information on the specific requirements or qualifications needed to become a Squadron Leader, or the typical career path of someone who holds the rank. It also does not provide information on the rank’s history or its use in other air forces.