Northern Ireland Electricity Networks Limited - Belfast

S S E - Londonderry

Coolkeeragh ESB - Londonderry

Energia Group - Belfast

Fathom Energy & Environment Ltd - Belfast

Weir PAT Testing - Ballymena

Full Circle Generation Belfast Irwin Way - Belfast

J & R Fuels - Ballymena

McCurdy Fuels - Ballymena

iuvo Energy - Cookstown