Thats exactly what mines did whenever it was cold, damp,raining etc it would always be there then used to die down, completely go when it had been run for a while...
Ive just come back holiday and my car hadent been driven for a few weeks but as soon as i started it it sounded awlful more metalic than it ever sounded before! coz i always thought it was the belt but always had my doughts.... Did you try the wd40?
On the right hnd side at the top of your engine where all the pipes go to your power steering pump if you try and move them to one side you will see where the belt is, the pully tensioner thingy at the top..... i sprayed wd40 not on the belt but just behind in the groove of the pully and the noise stopped for a moment before returning so im pretty sure its the bearing .
Ive got my car booked in for monday hope it aint gonna cost to much this bloody car has cost me a fortune since ive had it a year and a half ago......
Rob,