Having just spent a week on Skye, myself and my better half travelled over to Raasay to explore the Iron Ore Mine that was worked by Germa POW's. I have some photographs of the mine buildings etc, and would be happy to share them if anybody is interested. Please PM me as my computer won't let me post photographs on here. (Not enough steam up I think!)
More likely they are too big and contravene the forum size limit of 100K.
I believe that, technically speaking, German POWs could not be made to work in iron mines as this contravened the prohibition of work that directly benefited the war effort. Prisoners were usually asked to volunteer. Incentives were provided. I have come across an example of another iron mine on the British main land where this was done and POWs also worked the supporting railway. Some met local girls, married and their descendants are still living in this country.