The RAF had the reputation of being the glamour service in WW2.
Fighter pilots, especially, had the kudos, in some cases, of pop singers - popular with the women and a jaunty self-confident air about them. Their breezy air said a lot about how they wore their caps.
RAF personnel generally were nicknamed The Brylcreem Boys - *Brylcreem being a popular brand of hair cream for men.
The model in the advertisement is of course Denis Compton, the England and Middlesex cricketer - who had something of the breezy, sports-car driver air about him too. Wonderfully elegant stroke-playing batsman that he was, he must have made vastly more from Brylcreem than ever he did from cricket. (he also won a football FA Cup Winner's medal, playing for Arsenal.)
The WAAF (Women's Auxiliary Air Force) also had a bit of the glamour attached to them too. they were known as Waffs. The word is usually spoken by old airmen with a twinkle in their eye.