Luv 744s - Many thanks for your thorough explanation, I really appreciate it.
My first ever long haul (blimey 25 years ago now, sigh) was with TG to BKK from LHR and we had pretty bad turbulence for half the trip. I remember just focusing on the wing to my left -- okay port) and saw the give it had.
I truly realised then what a wonderful piece of engineering an aircraft is.
Again, my thanks.