Alfagy LimitedAlkane Biogas LtdClarke EnergyDresser-Rand Company LtdDreyer & Bosse Kraftwerke GmbhEdina GroupENER-GFinning UK & IrelandFirst Energy LtdFuture Energy GroupGascon Engineering B.VGC Brokerage LimitedGlantekHeat and Power Services LimitedHoStH²ADLandfill Systems Maintenance LimitedN-Energy LtdNewEnCoOrbinox UKPlanET Biogas UK Ltd.Premier Control Technologies LtdRichard Alan Engineering – CogentekshentongroupT-T Pumps LimitedTEDOMVolvox Engineering LimitedWilmeck Limited2G Energy