PVC Hopper window damage
We have a living room window with 2 hopper Windows, circa 300mm high x 1000mm wide. I was opening one of the windows and there was a snap while the window was closed. The Handle opens but the internal hindge must have snapped. I have removed the handle and it is not damaged. Hence the damage is in the sliding hindge. Question is how do I open the window to replace the mechanism ?