I have now uploaded a photo of the wooden flat wagon. Judging by the photo of wheels, including a couple of painted sets, uploaded by Hymac580c, this wagon is now totally destroyed.
I wonder why Llechwedd have so little regards for their own property? The Spooner wagon in particular is unique, it was even in one of the booklets that Quarry Tours published some time ago "Llechwedd and other Slate Railways". Now look at it!