SOSL:_
I noticed at minute 16.07, an Air Cdre,
Indeed SOSL, that was the College Commandant, Air Commodore (later Marshal of the Royal Air Force, Sir..) Dennis Spotswood GCB, CBE, DSO, DFC.
The Assistant Commandant was Group Captain (later Air Chief Marshal Sir..) Lewis Hodges KCB, CBE, DSO & Bar, DFC & Bar, DL (he was later Deputy Lieutenant of Kent). He also played a mean set of drums!