Alkali Environmental Limited

SOCOTEC UK Limited (Altrincham)

Anchem Laboratories

SOCOTEC UK Limited (Cirencester)

CES Environmental Instruments Ltd

SOCOTEC UK Limited (East Kilbride)

Cura Terrae OH & Emissions Testing Ltd (Warrington)

Tata Steel UK Ltd

Cura Terrae OH & Emissions Testing Ltd (Bradford)

TMS Environment

Element Materials Technology (Stockport)

Uniper Technologies

i2 Analytical Ltd