In the hot weather, it is sometimes pleasant to wind down the rear windows, but our Fabia estate is almost unbearably noisy with the air vibration at anything over about 20mph. Has anyone else found this and is there a simple fix such as air deflectors? Any advice gratefully received,

My windows chirp and are very noisy. Wind deflectors hasn't sorted it. I think its just the design of the car.

Mk1 has same problem.

Open the front window a little bit, if just you driving then crack open the passenger side for less wind noise.