OK, so let me give you the basics... Loud humming, grindy sound which gets worse with speed. Definitely a rotational noise. Minorly affected by turning whilst driving. Not affected at all by dipping clutch, coming out of gear etc etc. If the wheels are doing over X speed, then she's humming. Naturally, you would think wheel bearing, as I did. But it's not. Just changed the bearing yesterday and refitted to find the noise worse than before.... I know what I think it is, well, one of three possibilities. I just wanted other opinions.... Discuss.