During the war, Royal Enfield had a factory in Calton Hill, Edinburgh, which according to Wikipedia, manufactured the Flying Flea's drop cradles. It also manufactured forks and frames. Calton Hill is an iconic hill in the center of Edinburgh encompassing many historical buildings. It hardly sounds the place for a factory, but there is a rail station south of Calton Road and some large modern buildings in Greenside Road that could have been the site of a factory in the past. Google has street view of the area, but I have not been able to find anything. I even "took a walk" along Calton road and couldn't find anything. Does anyone know where the Royal Enfield factory in Edinburgh was?
Here is a picture of the factory in the 1950's,