Anyone who watched the 1970s BBC comedy "Are You Being Served" would recall the staff addressed each other as Mr/Mrs/Miss rather than christian names.
I note than in the BOAC video, there is no "Positive Climb" call, the Captain simply replies to the "V2" call with "Gear Up". As many of today's SOPs are the result of mistakes made in the past, I wonder what happened to cause the "Positive Climb" call to be introduced, i.e which airline pulled the wheels up too early on take off ?