MineArchiveThomas Williams and Sons (Llangennech) Ltd
A Carmarthenshire colliery company, one of the few middle-sized concerns to survive takeover by the large combines and last until nationalisation in 1947; it sank the Morlais pit in 1894.
Mines operated
| Mine | Region | Years |
|---|---|---|
| Brynlliw Colliery | Swansea | 1903–1947 |
| Grovesend Colliery | Swansea | 1900–1925 |
| Morlais Colliery | Carmarthenshire | 1894–1947 |
| Talyclyn Colliery | Carmarthenshire | 1900–1947 |
Record created: 8 September 2026 · Last researched: 8 September 2026