Grace Millar is a researcher on the ‘On Behalf of The People: Work, Community, and Class in the British Coal Industry 1947-1994’ and wrote a blogpost about the NUM archives and the importance of preserving them: https://www.wlv.ac.uk/about-us/news-and-events/latest-news/coal-mining-and-community-news/num-archive.php
You can find more about the project on the website. The research looks at eight case study pits: Tower, Prince of Wales, Markham (Derbyshire), Easington, Annesley-Bentinck, Barony, Bickershaw and Point of Ayr. They are doing oral histories as part of the project and some people on this list have already taken part. If there is anyone else who worked at one of those pits and would like to be part of the project (or knows someone who did) they would be interested to hear from you.
Dr Grace Millar
Postdoctoral Research Fellow: On Behalf of The People: Work, Community, and Class in the British Coal Industry 1947-1994
University of Wolverhampton