Thanks for all of your suggestions. I will try new pads and see, although they only have a couple of hundred miles on them. As far as living with this noise, but I can't do this. It's hard to really get the severity of this sound across to you but it is so bad it's extremely uncomfortable to hear. By the end of a ride I’ve lost all of the calm a good ride normally gives me. Are Disc brakes really worth it? I suppose that is another topic.
Rob.