Thanks, for the blowing of air advice.
I spent ages cleaning the window rubbers on both doors yesterday, first with WD40 and finally with silicone gel. It seemed to have made no difference at all, other than to ensure the windows were caked in greasy film.
It is strange that I've only really noticed this issue since the car had a second visit to the dealership for the door alignment to be corrected to try and cure the door wind intrusion.
Anyway, the cleaning and silicone cleaner on the seals does indeed seem to have worked because got in the car this morning and.... Both windows up and down time and again with no squeaks! The WD and silicone must have been soaking in overnight... Touch wood.
Thanks for what seems to have been a top tip
