Operation, construction and repair of gas pipelines and storage facilities, the construction of buildings including domestic buildings and particularly to the construction and design of buildings to include, or allow connection with, gas operated or powered devices and appliances; the installation of gas plumbing, gas points and bayonets and gas operated or powered devices and appliances; maintenance and repair services for gas plumbing, gas points and bayonets, gas operated or powered devices and appliances; operation construction and repair of electrical powerlines, the construction of buildings including domestic buildings and particularly to the construction and design of buildings to include, or allow connection with, electrical operated or powered devices and appliances, the installation of electrical wiring, electrical points and electrical operated or powered devices and appliances; maintenance and repair services for electrical wiring, electrical points, and electrical operated or powered devices and appliances; operation, management, repair and maintenance of power generating facilities and stations; operation, management, installation, repair and maintenance of power distribution systems and networks; construction of power generation facilities, stations and distribution networks; construction and maintenance services associated with energy generation, transmission and distribution facilities and infrastructure, construction, installation and maintenance of heating and cooling systems