I hate to break this to you Spanner, but the whole world does not run around with CAP413 in their flight bags, white gloves on, saying tootle pip, off we go
No they don't use those phrases either!
Not quite the point of my Post.
In the whole of my flying career I've never heard 'roger that' being used by a line pilot. Maybe things have changed in the past few years, but not in my experience?! I think the airline training Captains might have a wry smile and then correct the phraseology used.