Construction services; repair services; installation services; maintenance services; construction, repair, maintenance and installation services relating to effluent mining, storage, transportation and treatment; construction, repair, maintenance and installation services relating to water storage, supply, treatment, purification, re-use, transmission, transportation and distribution; construction, repair, maintenance and installation services relating to supply and distribution of energy, including electricity and gas; construction, repair, installation and maintenance services relating to power generation facilities, stations and distribution networks and associated plant, pipelines, fixtures and fittings, power distribution systems and networks; construction, repair, installation and maintenance services relating to energy generation, transmission and distribution facilities and infrastructure; construction, repair, installation and maintenance services relating to heating and cooling systems, railways and railways infrastructure