Outer Limits 4x4 Board

Have noticed a clunking noise when I turn left and right in the car. Sounds like there is a cricket ball rolling left to right under the car. I think it is coming from the rear of the car, although I can feel it in my feet slightly.

Just wondering if anyone has any idea what it might be.

Thought it was stuff rolling around in the boot but I've taken it all out and the noise is still there.

Thanks in advance