1
Electricity
4
Gas, gaseous fuels and oil
37
Installation, repair, emergency service maintenance of gas appliances, pipework apparatus and instruments using gas; laying, repair maintenance, replacement and refurbishment of pipelines; repair of roads and paths; construction, repair and maintenance of gas intallations; installation, repair and maintenance of energy-using appliances and instruments; construction, repair and maintenance of energy-using installations; installation of insulating materials, drilling of wells, exploitation and extraction of oil and gas, oil and gas drilling, oil pumping and extraction; underwater construction; demolition; building construction services; construction, maintenance and renovation of property
38
Communication and telemetry services, telecommunication services
39
Storage, distribution, transportation, shipping and delivery of gas, liquefied natural gas, gaseous fuels and oil; transmission and/or distribution and/or supply of electricity and other energy sources; leasing and rental of cars and commercial vehicles; underwater diving services
40
Generation of electricity; decommissioning of redundant gas and oil platforms and drilling rigs; waste disposal
42
Auditing of energy consumption and of efficiency of operation of appliances and the safety checking of appliances and pipework; scientific, engineering environmental research and development services; geophysical and geological surveys services; obtaining hydrocarbons such as natural gas and crude petroleum from below ground such as oil fields; underwater exploration; land development; surveying; computer services; maintenance and updating of computer software; design of computer software and programming; waste disposal; testing of gas appliances pipework, apparatus and instruments utilising gas, inspection of pipelines; measuring gas consumption