This seems to be made of MDF- certainly something like that. It doesn't have a door and is open backed. I think it may have been the surround for an electric fire originally.
Someone gave it to me a few years ago, and I thought it might be useful ... Now I need the room in the shed!! It is a bit grubby.
But if you can do something interesting with it, that would be wonderful!
Let me know when you can collect.