Possibly the most ambitious 2mm layout shown at public exhibitions, Copenhagen Fields has been under construction for a quarter of a century. It is now entering its final stage of building with the approaches to Kings Cross station.
In recent years, the layout has been exhibited its full form (30 feet long). Also, the goods yard on top of Copenhagen Tunnel, made famous in the Ealing Comedy "The Lady Killers", has been shown as a small self-contained layout.
Further details of the layout are on the Model Railway Club's webpages