Gleision mine deaths: Explosion 'like jet engine'
A mine manager has gone on trial over the deaths of four men in an explosion at a Swansea Valley pit.
Three men, including manager Malcolm Fyfield, 58, who denies manslaughter, escaped from the mine near Pontardawe.
David Powell, 50, Charles Breslin, 62, Philip Hill, 44, and Garry Jenkins, 39, died. MNS Mining also denies corporate manslaughter.
Swansea Crown Court was told the sound of the underground blast at the Gleision pit was "like a jet engine".
Cemlyn Davies reports.