I have walked along Ham Common and past Forbes House countless times and still I was surprised to see this dragon today. It is on the outhouse to the right of the main house.
It may be that the metal structure that it is on has some practicable purpose and the dragon is there to add decoration but this is not clear as there are flaws with both options, the structure has no obvious purpose and whimsical design is out of keeping with the rest of the fairly austere house.
This view is only available at this time of the year when the many trees around it are devoid of leaves.
I walked a little along the road to get a view without the trees in the way and the only one is this from almost dead in front which is very different as it hides the majesty of the wings.