Hotpoint CDT40, how to get the top off?

I think the belt has come adrift in my CDT40

I am trying to open the machine to see, but I cannot get the top off. I found the 2 screws at the back of the top, but the top is firmly fixed to the control pannel.

Any one have any tips to getting inside. it looks like I need to get the top off to be able get the sides off.

Thanks