I just got one of these in 7mm for Christmas - by D&S. The brass bogie castings are quite exquisite and were a bit of a surprise - Danny's kit's usually very nice whitemetal castings but I haven't seen many brass ones in them.
It's one of the Mathieson Models wagons. I think they're excellent. They've tempted me into a South Wales diversion, which would be much more problematic if you had to construct scads of PO wagons yourself