4
Gas, gaseous fuels and oil
11
Domestic appliances, cookers, fires, wall heaters, convector heaters, water heaters, fan heaters, gas boilers, gas central heating systems, microwave ovens, hearths; showers
12
Vehicles capable of being fuelled by natural gas, engines for aforesaid vehicles and parts associated therewith; all included in class 12
37
Installation, repair, testing, emergency servicing and maintenance of gas appliances, pipework, apparatus and instruments utilising gas; laying, repair, maintenance, replacement, refurbishment and inspection of pipelines; repair of roads and paths; construction, repair and maintenance of gas installations, services relating to the installation, repair and maintenance of energy-using appliances and instruments and to the 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; decommissioning of redundant gas and oil platforms and drilling rigs; construction, maintenance and renovation of property
39
Storage, distribution, transportation, shipping, delivery and metering of gas, liquified 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
40
Production of gas and oil; generation of electricity
42
Services relating to the auditing of energy consumption and of the efficiency of operation of appliances and the safety checking of appliances and pipework; scientific, engineering and environmental research and developement services; geophysical and geological surveys services; exploration of gas and oil; underwater exploration; land development; surveying of land and property; computer services, maintenance and updating of computer software; design of computer software and programming; waste disposal; underwater diving services