''Not very good coal !' - What nonsense ! Welsh Steam Coal mined in the Rhondda and Eastern valleys was exported worldwide fom Barry, Cardiff and Newport docks. It was used extensively by the Great Western Railway and was sought after as the best coal suited for locomotives and ships boilers. It burned efficiently, forming a homogenous mass of heat output yet with very low ash. 'Tredegar Coal' as it was called was once in worlwide demand such that many foreign navies felt disadvantaged without it.
