being too picky, but that seems a bit too close for me.
|2a=aye
|2b=aye
|2c=aye
|2com=References provided and properly organized. Perhaps expand the mysterious "(mhn)" after "Exeter University" to "Mining History Network"? Online sources seem to be reliable: major news organizations, academic articles or websites, a mining museum. Books look OK. I fixed the ISBN for Davies. To the extent I can access the sources, I don't see any OR; anyway, most of the article is straightforward and factual, with relatively little inference.
|3a=aye
|3b=???
|3com=I'm