Difficult to tell whether its the same noise as mine. As mine doesn't do it all the time and only if the revs are fairly constant for 2 secs or more.I have returned from the garage. The part which is required is on back order so am waiting for a call from the garage so I can then get it booked in to have it replaced. This link shows the noise if you listen carefully. It is like a wa wa wa noise.
http://www.alexgregory.co.uk/firstgear.amr
Oh right, yeah it is mine well then thats good to know. But I wonder what mine could be unless its meant to be like that.OCZedd- If your car is the 1.2 engined Grande in your sig, then it won't be the same fault as they don't use a centre driveshaft/bearing assembly.