what aarrong said makes sense, so it cant be the wheel.

The brake pads were replaced a few months ago so can't be them. Although the front disc is wearing cause i can see around the circumference towards the centre is a darker colour, could that be causing that sound? I was driving it again about 1hr ago and you can only really notice it around 40km/h, i accelerate a bit then release the accelerator and the noise comes and goes and repeat and hear it again. It definitely sounds like its coming from the wheel region/discs/brakes.