I took a friend out earlier for a 'brisk' drive, I stopped for a bit and the fan had cut in so I let the car cool down before turning it off. When I restated there was a distinctive whine constant with engine speed, I popped the bonnet and noticed it was coming from the A/C compressor, when I switch off the A/C (econ) the noise is gone.

I've not noticed any other issues with the A/C or fans.

Any ideas?

Cheers guys!