"The potential investment and returns for that investment are huge in this particular mine" says Wayne Thomas, from the National Union of Mineworkers.
"The access is already there, and the working methods could be adapted slightly.
"But the investment returns are there for the longer term, and I think there's stability there... for these individuals in South Wales who want to work in coal mining."
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An overcast and damp start for most. By lunchtime it should be mostly dry but the skies will stay largely cloudy.