Definetly wheel bearings. Mine used to hum and noise went away when cornering, came striaght back when I straightened up. Took it to Halfords £80 per side I think. Toruble is it kept reoccuring. 10k miles later and it was doing it again. Went through 2 sets of Halfords bearings, then took it to Stop n Steer Roker (old Charlie Browns) and they put a 3rd set on, problem never reoccured. I accused Halfords of supplying rubbish bearings and they told me it was because of my alloys... yeah but after 10000 miles?!
Jack the car up and wiggle wheel, if you can its a sign of the bearing.
Read your PM mate, Ill reply soon, as Im shutting down now.