Oil 4 Wales - Pontyclun

WDS Green Energy Ltd - Cardiff

Apex Energy Solutions South Wales - Port Talbot

Gas Link Wales Ltd - Pontyclun

Green Heat Wales - Cardiff

ENERGY SOLUTIONS (ES) LTD - Cardiff

LBS Builders Merchants Llantrisant - Pontyclun

R&S Energy Solutions Ltd - Pontypridd

Wales & West Cellar Gas - Pontyclun

ADAS Aberystwyth Field Office - Aberystwyth