Hi Neil, I bought my first E92 a few weeks ago in London and drove it back to Ireland. On the motorway I noticed a similar wind noise at higher speeds, but only on one side, the passenger side. When I got home, I compared both sides and on the side with the problem, I could see the clips for the shadow line trim and could not see them on the driver side. The window was not closing the same as the driver side too. It looked to me like the trim was pulled off at some stage and when put back on the rubber seal was put into the clips. It was a simple enough job to put it right. This may not be your problem but to check, you should not be able to to see the clips holding the trim on . The rubber seal should cover them.