squeaking sound from near the left handside wheel

Its hard to accurately say for sure what a noise is without hearing the noise first hand. A squeaking noise as the wheel/tire is moving (car driving down the road) could be a warning that the brake pads are worn and in need of replacement. Toyota has a little metal finger on the brake pads, as the brake pad wears to a point where the brake pad needs to be replaced the metal finger comes in contact with the rotating brake rotor. This contact emits a squeal to signify the brake pads need to be changed. A squeaking sound as the suspension encounters a speed bump could suspension bushing or upper strut mount. Its safer to have the noise checked out by a trusted local mechanic. If the brakes make a grinding sound as you apply the brakes damage has all ready been done and the car is unsafe to drive.

it is more that likely that the noise is coming from your CV joint. i curently have the same problem. tey r cheap and easy to replace but u can get any mechanic to fit it for you for next to nothing