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There is a clear value to a navigational list of narrow gauge railways in Wales. I would suggest that this category should therefore list them, not merely become a supercategory for railways by gauge. Many readers may know the name of a line, but not its gauge. We should not let some dogmatic approach to categorization reduce the usefulness to readers. Andy Dingley (talk) 11:55, 10 August 2013 (UTC)[reply]
It's a lot easier to do that through a category, than by creating a new list article. Andy Dingley (talk) 12:27, 10 August 2013 (UTC)[reply]
The past few weeks I created "narrow gauge railways in..." articles for almost every European country, like Narrow gauge railways in Germany (see the {Europe in topic|Narrow gauge railways in} template). Similar articles for Wales, England and Scotland are on my todo list. Any suggestions for this approach are welcome. --Aaron-Tripel (talk) 18:21, 11 August 2013 (UTC)[reply]
We already had such a list, through the category. There's no need to expend effort on writing a new article. Andy Dingley (talk) 18:59, 11 August 2013 (UTC)[reply]
The former situation was that the "Narrow gauge Railways in Wales" category contained a flat list consisting of 50-65 railways without any properties like gauge, location, still in service or not, length, etc. Just a flat list isn't very useful in my opinion.