Megane noisy belt or pulley

Hi to all, thanks in advance for any help . I have a megane 07 petrol with a very noisy belt or pulley at 3 thousand revs or more. It's more apparent when foot comes off the gas sounds like a loud food blender something metal spinning.

I also think that the car cutting out at odd times in morning when cold is related also weak power till warmed up.



I've been told Tdc timing sensor to which I agree but I'm certain as well that the belt or pulley system has a problem.



Any help appreciated Richard