In the context of renewable generation, additionality is about whether the customers action or decision has made a genuine reduction in emissions above and beyond what would have happened anyway.

An agreed amount of electrical load for a property, as stated in the propertys Connection Agreement with the local Distribution Network Operator (DNO).

The heat pump absorbs heat from the outside air and transfers the heat to the space to be heated in the heating mode. In the cooling mode the heat pump absorbs heat from the space to be cooled and rejects the heat to the outside air.

The unit that measures the rate of flow of an electrical current.

It is the sum of the annual consumption of all meters on a site. This comes from National Grid, and is based on historical usage from previous years. Measured in kWh (electricity) or Therms (gas). Supply Point AQ is the total annual consumption of all meters on a site. Meter Point AQ is the AQ for a particular Meter Point.

AMR is the term given to a system that provides automatic meter readings remotely. It uses telephone technology and holds the ability to transfer data into a billing system.

Also known as the Agreed Capacity, this is an agreed amount of electrical load for a property, as stated in the propertys Connection Agreement with the local Distribution Network Operator (DNO).

Base load is the level below which electricity demand never drops, i.e. a site with a high maximum demand of 750 kVa whose demand never drops below 250 kVa would have a base load of 250 kVa.

Trading whereby two parties (for example a generator and a supplier) enter into a contract to deliver electricity at an agreed time in the future.

Biomass, also known as biofuels or bioenergy, is obtained from organic matter either directly from plants or indirectly from industrial, commercial, domestic or agricultural products. The use of biomass is classed as a 'carbon neutral' process because the carbon dioxide released during the generation of energy from biomass is balanced by that absorbed by plants during their growth.

The BETTA arrangement was introduced in 2005 to create a single wholesale electricity market for Great Britain. It replaced NETA, which did not cover Scotland.

An option in the Kyoto Protocol that allows a group of countries to meet their targets jointly by aggregating their total emissions. The member states of the European Union are utilizing this option.

BREEAM is used to assess the environmental performance of both new and existing buildings. Credits are awarded in each area according to performance.

Amount of heat given by the specified quantity of gas. This is used to calculate the energy consumed based on the volume of gas used. It is measured in joules per kilogram.

A set charge by the local Distribution Network Operator (DNO) for investment and maintenance of the electricity network, based on the Agreed Capacity of a property. This can also be called the Availability Charge.

Carbon capture: A credit or permit arising from a greenhouse gas emissions reduction scheme, such as emissions trading, JI or CDM. Emissions are controlled by setting a cap on total emissions and allowing the market sector(s) to reach an economically balanced response via trading of emissions allowances. Carbon storage: Sometimes called carbon sequestration, this is the long-term storage of carbon or CO2 in the forests, soil, ocean, or underground in depleted oil and gas reservoirs, coal seams and saline aquifers. Carbon Capture and Storage can be referred to as CCS.

An inert non-toxic gas produced from decaying materials, respiration of plant and animal life, and combustion of organic matter, including fossil fuels.

In relation to carbon emissions, CO2 is measured in tonnes. A typical household has around 10.9 tonnes of CO2 emissions per year.

A measure of the amount of carbon dioxide or CO2 emitted through the combustion of fossil fuels; can be measured on a personal or national level, or according to a specific activity, such as taking a flight to go on holiday.

An activity or process that doesnt add to the net amount of CO2 in the atmosphere. As the organisation or product will typically have caused some greenhouse gas emissions, it is usually necessary to use carbon offsets to achieve neutrality.

The CRC is a UK government emissions trading scheme for large organisations that are not eligible for EU Emissions Trading. This includes banks, large offices, universities, large hospitals, large local authorities and central government departments. The scheme is mandatory. The CRC is expected to deliver emissions reductions totalling 0.5m tonnes of carbon (Mtc) per year by 2015.

The trading of personal, corporate or national credits to maintain and gradually reduce carbon emissions. Companies, nations or individuals who beat the targets can sell the balance as credits to those that exceed their limits.

In order to encourage individuals to reduce carbon dioxide emissions a value has been placed on carbon. The more you produce the more you pay. Within the EU, the Emissions Trading Scheme provides a mechanism for capping total C02 emissions and generates a carbon value, as market participants and given are given allocation of CO2 they are permitted to produce, and can buy from or sell to each other to balance their allocations with their requirements. To give investors the confidence to invest in low carbon solutions and thereby help to reduce emissions it is necessary to have certainty that there will be a long-term value of carbon.

A joined up series of electrical conductors, wires and components that allow an electrical current to flow.

There are significantly higher greenhouse gas emissions for each unit of electricity produced by coal-fired generation than there are for alternative methods of generation. CCT makes using coal as a power source more environmentally friendly.

The variation in the Earths global climate over time. Man-made climate change is a variation directly attributable to human behaviour.

CCL is a government-imposed tax to encourage reduction in gas emissions and greater efficiency of energy used for business or non-domestic purposes. CCL is chargeable only on units/kWh used and not on any other component of the bill, e.g. standing charge.The rate of CCL is now index-linked and therefore likely to increase on 1 April each year. Under current legislation: where VAT is charged at the standard rate, CCL (plus VAT on CCL) will usually be added to the bill where VAT is charged at the reduced rate, the supply is automatically excluded from CCL green energy (i.e. from renewable sources) is automatically exempt from CCL. Where VAT is charged at the standard rate but sites are entitled to full or partial relief from CCL, you will need to submit a PP11 Supplier Certificate for each site to advise us what percentage of relief is applicable. PP11s are only available from HM Revenue & Customs (HMRC) and can be downloaded from their website www.hmrc.gov.uk. Please note that PP11 Supplier Certificates are not transferable between suppliers.

Natural gas generated and trapped in coal seams. Coal Bed Methane (CBM) involves directly drilling into unworked coal and coal measures strata to release the methane locked within it rather than utilising methane released as a result of mining activities.

Methane continues to emit from the coal mine after closure, and recently the concept of collecting the gas from abandoned mines to provide an energy source that would otherwise be wasted has been developed.

Sector Skills Council for the oil and gas extraction and chemical manufacturing sector.

A gas fired electricity generation plant that uses waste heat to power a steam turbine.

When electricity is generated up to 60% of the energy can be wasted as lost heat. Combined Heat and Power schemes are designed to recover most of this waste heat and use it to power a turbine and generate more electricity. In well designed installations these can contribute to lowering carbon dioxide emissions.

A fee levied by National Grid on the quantity of gas transported through the system.

A substance that allows an electric current to pass through it easily.

A document that states the Agreed Capacity for a property with the local Distribution Network Operator (DNO).

Price of a unit of gas or electricity that the shipper charges the customer.

Classification for those customers with electricity demand greater than 1 MW with two meters installed (main and check). These supply three feeds of data (kW, lag, lead).

For sites using large amounts of gas it is often deemed necessary to measure the temperature and pressure variations more accurately rather than just applying a fixed conversion factor. In these cases an additional corrector meter is attached to the meter.

Current Transformers are meter types that allow large loads to be measured by reducing the level of current passing through the meter to a manageable level.  An example CT Ratio is 200/5 that means that for every 200 amps of current received, only 5 amps are passed through the meter. As a result CT meters rarely require a site shut down when being installed.

The quantity of gas to be supplied daily to a site (sales contract) or to a terminal (supply contract).

The information relating to the amount of energy consumed by a given metering point or collection of metering points.

An organisation accredited by the Pool Accreditation Body to carry out Data Collection for Half Hourly (HH) Metering Systems. The DC is appointed by the Suppliers to retrieve and validate metering data and forward it, by Metering System, to the Data Aggregator. The DC may be appointed by the customer but must always be accredited and contracted to the customers Supplier.

A data logger collates all the information recorded by a number of smaller meters.  Data loggers tend to be used on large consumption sites or for other utilities such as gas, water and fuel oil where the existing meters do not have any means of sending data directly to a data collector.

The highest generation of electricity (assuming that the source of power is available continuously) being maintained indefinitely without causing damage to the plant, minus the capacity consumed by the plant.

Rate of electricity usage/consumption.

Depleted uranium means the by-product residues from the uranium enrichment process in which the concentration of the isotope U235 is less than that occurring in natural uranium.

This is when electricity is generated for local distribution and is not connected directly to the National Grid. Microgeneration is typically used to describe smaller scale generating technology. Both of these types of generation have a role to play in Britains energy mix, although it is important to be realistic about the overall size of the contribution - they may not be the best economic or most environmentally friendly solution in every case.

Charges for the loss of distributing power through the wires.

These charges are published costs made by each Distribution Company for delivering electricity from the Grid Supply Point to the customers premises.

A Supply Point with an AQ of 73,200kWH (2500 therms) or less, is deemed as a domestic site. (This does not mean the user is necessarily residential). A supply point with an AQ of over 73,00kWh is deemed as non-domestic.

The centre that remotely interrogates the meters, and sends the information up to the Data Aggregator.

The rate at which electricity flows through an electrical conductor, usually measured in amperes (amps).

A device that measures the amount of electricity used.

A magnetic field produced when an electric current is passed through a wire wrapped around a piece of iron.

A market mechanism that allows emitters (countries, companies or facilities) to buy emissions from or sell emissions to other emitters. Emissions trading is expected to bring down the costs of meeting emission targets by allowing those who can achieve reductions less expensively to sell excess reductions (e.g. reductions in excess of those required under some regulation) to those for whom achieving reductions is more costly.

An EU programme supporting research, development and demonstration aimed at delivering cost effective solutions to key energy related problems on a European scale. In particular the aims are to minimise the environmental impact of the production and use of energy and to increase the share of new and renewable energy sources in EUs energy balance.

This is the cost of the electricity purchased on the wholesale market at the Notional Balancing Point (NBP) to cover current and predicted future usage. It is the single biggest component of the unit price and typically accounts for between 60 and 80% of a businesss total bill. In the industry, this element is called Energy at NBP (Notional Balancing Point).

Formerly known as Energy Efficiency Standards of Performance (EESoP), is an obligation placed on all domestic energy suppliers to achieve a specified energy saving target through the installation of energy efficiency measures in homes across Great Britain.

An offer of electricity that has no delivery charges (DUoS & TUoS) added at the point of quotation.

The principal objective of the Directive is to promote the improvement of the energy performance of buildings within the EU through cost-effective measures. There are four main aspects to the EPBD. 1) Establishment of a calculation methodology for buildings energy performance 2) Se minimum energy performance requirements for new and existing buildings 3) Energy performance certificate made available 4) Inspections of boilers and air-conditioning systems

A company that specialises in managing energy and water conservation projects. The ESCo may perform any or all of the following services: auditing, developing packages of recommended measures, arranging financing, installing or overseeing installation of measures, resident and staff education, equipment commissioning, maintenance, measuring, verifying, and guaranteeing savings. An ESCo is normally a deregulated organisation set up to provide energy services (electricity, heat and chilled water) to a defined set of users or a local community separate from the incumbent regulated utilities serving the area.

Uranium in which the proportion of U-235 (to U-238) has been increased above the natural 0.7%. Reactor-grade uranium is usually enriched to about 3.5% U-235, weapons-grade uranium is more than 90% U-235.

Point at which gas is delivered into the National Transmission System i.e. the terminal.

The EU emissions trading scheme, introduced in April 2005. See the section on Carbon emissions trading scheme, above.

This enables a site to export electricity generated onsite.

A daily, monthly or quarterly charge levied by the supplier and is in addition to the standing charge.

Electrical wire covered with an insulating material.

Burning coal produces sulphur dioxide that is emitted through the chimney of the power station. To reduce these emissions, which contribute to acid rain, a Flue Gas Desulphurisation unit can be fitted to coal powered plants. These work by capturing the gasses in an absorber; these are then mixed with limestone to produce gypsum which is then dried and can be used in industry. This method leads to a 90% reduction in sulphur dioxide from coal fired plants.

An agreement to buy electricity from another party at a specified time in the future at a specified price with money changing hands at the delivery date.

In England and Wales the Fossil Fuel Levy is set at 0.3%. This levy was introduced to cover the cost of decommissioning the nuclear generating plants. The Scottish equivalent is called the S.R.O. (Scottish Renewable Order) levy which was set at 0.8%

The FMD regulations oblige all suppliers to calculate and publish the fuel source and emissions intensity of all the electricity they supply. This includes electricity generated by the supplier and electricity bought from other generators, either through contracts or in the marketplace.

A safety device, which protects electrical appliances by preventing too much electricity flowing into them. The fuse is a thin wire inside a protective case. If the flow of electricity becomes too powerful, the wire melts and stops the current flowing.

A pressure reduction station located on customers premises where gas is reduced from mains pressure regulated at a medium or low pressure for domestic or industrial use.

Around one third of the UKS electricity is currently produced by gas-fired power stations. Combined Cycle Gas Turbine (CCGTs) are currently the more favoured option for new large-scale electricity generation in the UK compared to new coal power stations. Burning natural gas to produce electricity does emit carbon dioxide, but the emissions are significantly lower than from coal. However, the availability of gas and the cost is likely to be unpredictable so there could be a risk that when you need the electricity there may not be enough available, or that relying solely on gas fired generation will lead to increases in your energy bills.

This covers the production of electricity at power stations. At present the main fuels used are gas, nuclear and coal, although there is now a growing use of renewable forms of energy, such as wind power, the burning of gas from landfill and waste incineration.

Giga Watt 1,000 MW.

Mobile data service available to all users of the cellular communication systems global system for mobile communications.

The way gases in the earths atmosphere trap heat. The build up of these gases, especially carbon dioxide, are thought to cause global warming.

A widely used standard for emissions reporting. The protocol covers project emissions reporting and corporate emissions reporting. The corporate emissions reporting standard provides a methodology for calculation of a carbon footprint. The protocol was developed by the World Resources Institute and the World Business Council for Sustainable Development.

A standardised agreement for trading UK power at the National Balancing Point.

A mobile device that is connected to the meter and remotely reads the meter by signal. It has to be very good signal for the GSM to work.

A communication device connected to the meter allowing the data collector to remotely connects to the meter, obtaining half-hourly consumption.

Since April 1998, code 5 meters have been mandatory for all sites over 100 kva and voluntary for sites under 100 kva. This meter sends your consumption record by telephone or radio every half-hour to a central data bank. The supplier will then receive this information from the data collector and bill the client accordingly.

HDC is a levy enforced by the DTI on all electricity suppliers across Great Britain. It is a tax that has been generated to assist areas with high electricity distribution costs.

The HHDA is responsible for aggregating meter data by Supplier and Consumption Component Class. The data is received from the HHDC (Half Hourly Data Collector).

A device which can be used on site and connects into the meter to retrieve and store the data from the meter.

Uranium enriched to at least 20% U-235.

Producing electricity by using the force of falling water to turn the turbine blades, usually accomplished by damming a river to create a source of falling water.

An independent company who has responsibility of the maintenance of a gas supply network.

A material that reduces or stops the flow of electricity.

IPPC Directive is about minimising pollution from various point sources throughout the European Union. Based on the concept of Best Available Techniques (or BAT).

Interval energy data is collected by an interval meter, which, at the end of every interval period (e.g. every half hour), records how much energy was used in the previous interval period. This data is also often referred to as "interval meter data", "demand interval data", "kW interval data", "electricity interval data."

This is an international standard for corporate emissions reporting. It builds on the approach outlined in the Greenhouse Gas Protocol.

A standard unit of electrical power equal to 1,000 watts. Kilowatts are the units used to measure Maximum Demand. Kilowatt hour is a unit of energy consumed.

In 1997, representatives from over 170 nations met in Kyoto, Japan to put together a new global treaty - the Kyoto Protocol to the United Nations Framework Convention on Climate Change (UNFCCC) - laying down legally binding reductions in greenhouse gas emissions throughout developed countries emissions by an average of 5.2 per cent below 1990 levels over the period 2008-2012.

Defined as the sum of Supply Offtake Quantity (SOQ) for all large sites.

Organisations that pay the CCL can enter into agreements with suppliers to purchase renewable electricity. The Levy Exemption Certificates (LECs) are evidence of CCL exempt electricity supply generated from qualifying renewable sources. LECs will be redeemed by suppliers to HM Customs and Excise to demonstrate the amount of non-climate change electricity able to be levied that had been supplied to non-domestic customers in the given period.

When natural gas is cooled to a temperature of approximately -160 degrees celsius at atmospheric pressure, it condenses to a liquid called LNG.

Measures the relationship between unit consumption and maximum demand and is the percentage capacity utilisation figure of a site's power consumption. To calculate load factor take the total number of units of consumption, divide by the maximum demand, divide by the number of hours in the period, and multiply by 100.

If for any reason actual data is unknown a profile can be calculated using historic data.

Local Distribution Zone is a Transco defined area for which the total input and output demand can be measured each day.

Launched in 2006, the LCBP is a UK government programme that provides funding towards the cost of installing microgeneration and other low carbon technologies.

Uranium enriched to less than 20% U-235. (That in power reactors is usually 3.5 - 5.0% U-235.).

Electricity supplied to our homes from the National Grid.

A classification if a site is Industrial & Commercial or Domestic.

Maximum Demand is the highest peak of usage (kWH) in any Half Hour during a calendar month or between two meter readings measured in either kW or kVA. This value is multiplied by 2 to give the MD on an hourly basis.

Mega Watt - a measure of power, one million watts.

The point at which the flow of electricity is actually measured. A single meter can contain one or more registers for measuring different sub-system quantities. The identifier will be up to ten characters long and consist of the make and model code, together with the meter serial number.

The party responsible for the ongoing provision of the meter installation at that meter point. Where a MAP provides the meter, the MAM may be the owner (title owner) of the meter or the MAM could lease or rent the meter from a third party.

This charge covers the cost of maintaining metering equipment.

The number stamped on the front of the meter. This changes when meter is exchanged.

The small-scale generation of energy, for example solar panels or domestic wind turbines. These are often referred to as generation from renewable sources at a domestic or small community level.

The Agreement authorises meter operators to install and connect meters to the electricity network by clarifying that the equipment being provided, installed and maintained meets appropriate technical requirements and that work is carried out to adequate safety standards.

A 13 digit number headed by a REC ID used to identify customers, for example, 2212345678997. MPANs only refer to electricity meters.

Mega Watt hour, one thousand kWh. A 1 MW power-generating unit running for 1 hour produces 1 MWh of electrical energy.

The National Grid owns the main transmission systems and is responsible for transmitting the electricity from the generator to the local RECs area. All electricity generated in mainland UK is put into the National Grid before fed into distribution networks.

Uranium with an isotopic composition as found in nature, containing 99.3% U-238, 0.7% U-235 and a trace of U-234. Can be used as fuel in heavy water-moderated reactors.

In England and Wales these arrangements replaced the pool from 27 March 2001. The arrangements are based on bi-lateral trading between generators, suppliers, traders and customers and are designed to be more efficient, and to provide greater choice for market participants.

Collects non half hourly consumption data from the end users. This data is then sent in to the NHHDA who may or may not be the same organisation.

A notice to xoserve from a Shipper to indicate the request for the offer details for a Supply point (transportation, metering, capacity, commodity costs, etc.)

Volume of gas consumed at supply point is recorded at monthly, quarterly or longer intervals by traditional meter reading.

NBP is where entry gas is brought to a virtual point in the system from which network users can transport to an exit point, thus becoming a trading hub.

Generates electricity using heat produced by an atomic reaction. The process of generation produces negligible amounts of carbon, which is why nuclear is put forward as one way of reducing global carbon footprints. However, the huge financial expense, the storage of spent radioactive materials, the safety record and potential for serious disaster like Chernobyl and the carbon cost of extracting uranium ore to use as fuel are powerful arguments against the adoption of more nuclear power stations.

A notice from XOSERVE to a Shipper in response to a nomination indicating the charges to be levied on a Supply Point.

An emissions reduction, commonly resulting from a project undertaken in the developing world, which has been sold to compensate for emissions elsewhere. Offsets are commonly used to net off corporate emissions so that an organisation can claim to be carbon neutral.

This is where the Cogeneration unit runs in parallel with the grid.

Point of maximum electricity demand on the national system.

The direct conversion of solar radiation into electricity by the interaction of light with the electrons in a semiconductor device or cell.

A cleared market for electricity trading, for example APX.

Electrical wires that carry electricity from the point of generation to the point of use.

The operating methods and procedures used prior to the introduction of the Network Code.

Used to register suppliers, meter operators and distribution companies for settlement purposes for all premises in the UK.

Thermal degradation of waste in the absence of air to produce char, pyrolysis oil and syngas.

Certain Distribution Networks apply Ratcheting to their MPANs in case the customer should use over their agreed Availability (kVA). Once the account has been billed for Excess Availability, the level up to which they were billed becomes their new Availability (kVA), depending on the specific Networks policy.

This is the difference between the electricity supplied and the electricity converted into useful power. If the difference is large, i.e. there is a large amount of power being wasted, its puts an additional strain on the distribution network. The loss of power can be caused by kinetic energy (heat) or through defective machinery. This is measured via the Reactive register on a meter and is charged to the customer depending on how much they accumulate.

The register is a series of dials (or digital displays) which record the amount of energy used. In CoP 5 meters, the meters can have up to 25 registers set up to provide information on, for example, demand peaks and totals.

OFGEM is the Office of Gas and Electricity Markets, regulating the gas and electricity industries in the UK. This is a statutory body representing the interests of gas and electricity consumers in the UK.

Renewable energy is used to describe the energy produced using naturally replenishing resources. This includes solar power, wind, wave and tide and hydroelectricity. Wood, straw and waste are often called solid renewable energy, while landfill gas and sewerage gas can be described as gaseous renewables.

RECs, also known as Green Certificates, green tags, or tradable renewable certificates, represent the environmental attributes of the power produced from renewable energy projects and are sold separate from commodity electricity.

This is the main government market mechanism to support renewable energy. It is an obligation on all electricity suppliers to supply a certain amount of their electricity sales from accredited renewable sources under the Climate Change Levy exemption scheme.

The new Renewables Obligation and associated Renewables (Scotland) Obligation came into force in April 2002 as part of the Utilities Act (2000). It requires power suppliers to derive a specified proportion of the electricity they supply to their customers from accredited renewable sources. This starts at 3% in 2003, rising gradually to around 10% by 2010 and 15.4% in 2015/16.

A project to determine industry wide business processes supporting data flows to underpin competition in gas metering services.

The SIC is a standard classification code that identifies the types of business conducted at the site.

This is the body that "settles" the distribution of electricity to establish where and to whom the generated load has been distributed to.

A document produced under the auspices of the (National Grid)

A geographic location at which gas is consumed by the customer. There may be several gas meters at a site, which measure the volume of gas consumed.

Small site PD Demand = Sum of (reference consumption) for all small sites.

A form of analysis used to compare gas prices with electricity prices, by converting the gas price into a price per MWh and subtracting it from the electricity price in that period, taking into account power station efficiency. A negative spark spread indicates that it is more beneficial to sell gas than to produce and sell electricity.

These play an important part of the national grid. They contain transformers that increase or decrease the voltage of an electric current.

A person authorised by a supply licence to supply electricity or gas to the National Grid Network, via the Shipper.

A site where the supplier has the right to interrupt the supply for commercial reasons.

S-Number (also known as MPAN - Meter Point Administration Number). A unique number identifying the distribution company and the location of the metering point.

A group of one or more meters for which National Grid shall make Natural Gas available for offtake by the Shipper.

Name for the Meter Readers in the NETA.

Suppliers quote for electricity in numerous different formats. These range from simple one-rated structures (the same price per kW at all times throughout the year) to complex "Seasonal Time of Day" tariffs, which are multi-rated. i.e. the price changes three, six or eight times a day.

Quantity of heat produced in relation to fuel input.

Codes that state what date and time the meter registers start and finish.

Equipment that is used to change the voltage of an electric current. Transformers can increase or decrease voltage.

When transmitting electricity from generator to local distribution network areas some electricity is lost. Specific calculations have to be made by suppliers to determine the level of these losses.

A charge made by National Grid for the national transport of the shippers gas through the gas network (National and Regional Transmission system and the low and medium pressure distribution system) to the customer. The transportation charge consists of three elements, which are dependent on the locations of the particular terminal and offtake site: capacity charge; commodity charge; and site charge.

Kyoto target all greenhouse gases 12.5% below 1990 levels by 2008-12 National goal CO2 20% below 1990 levels by 2010 Long-term goal Reducing CO2 emissions by some 60% from current levels by 2050

The price per unit of energy, which includes 3 components only energy wholesale price (energy at NBP), infrastructure costs and a cost to serve element

VAT is a government-imposed tax on the supply of goods and services. There are currently 2 rates of VAT applicable to supplies of electricity and gas the standard rate and the reduced rate. On supplies used solely for business purposes, VAT will usually be charged at the standard rate. Where supplies are wholly or partly for domestic or charitable non-business use, that part of the supply qualifies for the reduced rate of VAT. This is known as qualifying use. Customers with qualifying use will need to submit a VAT Customer Declaration Certificate for each site, to advise us what percentage of the supply meets the qualifying criteria set by HM Revenue and Customs (HMRC). Please note that VAT Declaration Certificates are not transferable between suppliers.

The Voltage Scale is not set by the customer, but determined by Networks when the premises supply is connected. The kVA requested by the customer and what Networks are faced with when installing the supply, will determine which voltage scale is required. The voltage scale can also be determined via the Line Loss Factor.

A notice issued by a shipper indicating that they wish to cease ownership of a Supply Point.

The portion of the waste stream (domestic and commercial) that cannot currently be recovered or recycled.

Metering that is 100 amp and below.

The gross calorific value of natural gas divided by the square root of the Relative Density.