Indesit Evolution 1600 WE16 noisy on spin?

I have an Indesit Evolution 1600 WE16 machine and when it goes on the fast spin there is a noise coming from it like there is some sort of object in the drum. I've had the top off and tried to see where something could be rattling about in but can't see anything. Does anyone know of any area something could have become stuck in, failing that is there any way to get better access to the drum housing?

Thank you