Well, had the brakes, bearings and all surrounded mechanics inspected and everything seems in order. The only thing the mechanic could suggest was the brake shims/clips (that touch the disc when the pads get low as an audible warning).
The scraping noise it still there - but as all the mechanics have checked out ok, it is more an annoyance than anything else.
I have done some tests to see what creates the scraping noise since, and it does seem suspension related more than steering (as I get the noise over speed bumps in a straight line).
I think the next step is to get the suspension joints/bushes checked out, but this probably won't be for a while. In the short term I i will see if I can remove the shim/clip on the brake pads and do another test to see if the noise is still there.
It may take some time, but I'm determined to suss this one out.