No havent got it sorted yet, hoping to get it looked at this week as I have time off work.... As it's not wheel bearing, I'm guessing its something expensive, such as driveshaft/gearbox/clutch as it is speed related, it must be on the final drive somewhere... sounds very much like a wheel bearing though, and gets a bit louder + more grating when cornering so was shocked to find they are all fine!
for the sake of £33 I suppose you may as well give it a go though!