Have ordered new tensioner and belt (CRD), and could not wait so took off fan belt and yes jokey pulley is loose as and squeals away like extremely dry/worn bearing. This might have been the grinding/meshing noise I have been occasionally hearing of late.
I also, sometimes hear a high pitched song (like file on edge of thin spinning disk) and it may not be my shinny SS induction whistle after all... hahaha.
Think I can rest assured now that the unwanted noise it is most likely my tensioner.... Will know when job done and but must say getting belt off (the first time) was easier that removing oil filter (removed no cowling, just rotated tensioner arm).