1935 documentary about the hard working life of Welsh coal miners.
| Directing | Alberto Cavalcanti | Director |
| Production | John Grierson | Producer |
| Editing | William Coldstream | Editor |
| Writing | Alberto Cavalcanti | Writer |
| Writing | Montagu Slater | Writer |
| Crew | W.H. Auden | Poem |
| Sound | Benjamin Britten | Original Music Composer |
| Camera | Stuart Legg | Director of Photography |
| Camera | Basil Wright | Director of Photography |
| Sound | E.A. Pawley | Sound Recordist |
| Sound | William Coldstream | Sound |
| Sound | Stuart Legg | Sound |
| Camera | Humphrey Jennings | Additional Photography |
| Camera | Harry Watt | Additional Photography |
