Volvox Engineering LimitedTEDOMT-T Pumps LimitedshentongroupRichard Alan Engineering – CogentekPremier Control Technologies LtdPlanET Biogas UK Ltd.Orbinox UKNewEnCoN-Energy LtdLandfill Systems Maintenance LimitedH²ADHoStHeat and Power Services LimitedGlantekGC Brokerage LimitedGascon Engineering B.VFuture Energy GroupFirst Energy LtdFinning UK & IrelandENER-GEdina GroupDreyer & Bosse Kraftwerke GmbhDresser-Rand Company LtdClarke EnergyAlkane Biogas LtdAlfagy LimitedAgrogen GmbHAnaergia Ltd