2mm Is this a layout or a diorama?

Joe's Garage

Western Thunderer
Firstly I apologise for posting a photo of a photo in a magazine but I was quite taken by this picture. It was in the Model Rail magazine February 2021 advertising the subscription but there is no indication of the actual model.
Does anyone know this rather fine model please?
If it infringes any rules I do apologise but I would like to know more about the model.
Thanks
Julian3FC8C2D3-6543-4B80-A1A0-59A03C09930C.jpeg
 
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