December 12th 1866 The Oaks Pit Explosion, the worst mining disaster in England, occurred near Stairfoot in Barnsley in the West Riding of Yorkshire killing 361 miners and rescuers.

THE OAKS PIT DISASTER Sung by Keith Tomlinson on the Yorkshire Garland site https://www.yorkshirefolksong.net/song.cfm?songID=130
To the Oaks Pit near Barnsley on the 12th of December
About four hundred colliers to work they did go,
In health and in strength upon that fatal morning,
Not thinking of danger they descended below.

Oaks Explosion from Wikipedia https://en.wikipedia.org/wiki/Oaks_explosion#:~:text=The%20Oaks%20explosion%2C%20which%20happened,worst%20mining%20disaster%20in