Ha!
I have same wind noise "feature" on the front driver and passenger doors...the noise (sounds as if window partially opened) kicks in at 60mph so I have lived with it until its first service which was today..it is annoying..
Dealer says its normal for this car and said they took out another one which also had the same issue...

i advised them of the things to check and there should be a TPI in for this but they cannot find anything..
just done a bunch of research on it and will have found a TSB 2023699 off a US forum, might be same for UK? plus using some silicone grease, krytox, B pillar padding?, window surround seal and door alignment to check
i won't let it go for a car that costs this much!!
does anyone know what the TPI number is? it has been mentioned in a few posts and think this could solve it once and for all..