of Hoyland, near Barnsley
1971 Company set up by Gerry Penrith
1975 Developed a safer method for moving the shearing machine at a longwall coal face[1]
1977 Queens Award for technology[2]. National Enterprise Board invested and acquired c.20 percent of the company[3]
1978 Sales had expanded by 50 percent in the past year. NEB sold its holding to Booker McConnell[4]