These cookies are absolutely essential for our website to function properly.
We use Google Analytics to measure how you use the website so we can improve it based on user needs.
These cookies may be set by third party websites and do things like measure how you view YouTube videos.
National Coal Board Certificate of Authority as a Competent or Authorised Person. Issued to Granville David Thomas at Cwmcarn Colliery who is "authorised to drive the overhead crane in the Winding Engine House at Cwmcarn Colliery". Undated. Black print on white paper with handwritten details.
