Thanks for the info. I've had a "wheel bearing" noise for a couple of months. It doesn't vary when cornering so I was starting to worry it could be a diff bearing. In fact it still could be. It sounds like a bearing though as it's not a constant noise, has a break in the repetitive noise that sounds like a defect in the bearing race. I need to get the car up on axle stands and see if I can feel any play in a wheel, or if that bake tab could be the culprit, or hear a noisey diff with the wheels turning.....

Ian