These are rather fine looking models, the advantage of 16 mm is that you can see this through the windows. Ummmmm...lovely scale!! Can you show us what the exterior looks like as well? Any locos?
As requested a picture of the outside of the coach minus wheels (but without roof and end detail), also included is a picture of a young Mr Insole taking notes inside the real thing at the NRM, and another picture of the model taken from the equivalent place. The finished model has been bought by the L&B Trust for eventual display in their museum.