In the gas pages you will find out about the connections process, how to manage a connection, charges for connections, market operations and data, how we balance the network, how we manage capacity, and more.

NTS gas connections

Connecting to, diverting, and shipping using the National Transmission System (NTS).

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How we keep the system within safe operating limits, including acting as residual balancer to influence the matching of supply and demand.

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Charging and methodologies

Details about charges that users of the gas National Transmission System (NTS) have to pay, how they are calculated, and how we handle capacity.

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Market, operations, and data

The latest operational data and real time flow data, maintenance plans, information about gas quality, and entry and exit capacity details and reports.

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Network gas supply emergencies (NGSE)

Find more about our emergency arrangements and the processes relating to network gas supply emergencies (NGSE).

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Pipelines Maintenance Centre (PMC)

Pipelines Maintenance Centre (PMC) is the leading authority in the UK on emergency and planned solutions in the field of pipelines repair, maintenance, and intervention.

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Gas system operator incentives

We are subject to a number of performance incentives to maintain and improve our daily operational efficiency and are subject to renegotiation at set intervals.

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About National Grid

We own and operate the gas National Transmission Systems (NTS) in Great Britain, with day-to-day responsibility for balancing supply and demand. Our network comprises over 7,000 kilometres (4,400 miles) of high-pressure pipe and more than 600 above-ground installations.

Who supplies gas

Our role is to transport gas through the pipelines. We do not sell gas. The gas in your home or business is supplied to you by a gas supplier. Only suppliers licensed by Ofgem can sell you gas. You can find more information about who supplies gas in your area from the Energy Networks Association website.

Who is involved with gas

Gas producers and importers sell gas to licensed shippers who then own the gas as it travels through the transmission and distribution networks. Shipping involves buying gas from the producers, arranging for it to be conveyed to supply points (via our NTS) and selling it to gas suppliers. We are not a gas shipper.

Shippers pay us to run their gas through our NTS and liquified natural gas (LNG) importers pay for the right to land LNG at our importation terminals. Shippers also pay gas distribution network operators to transport their gas to homes and businesses. These charges are passed on to consumers and reflect the cost of building, maintaining and operating the networks and running a 24-hour gas emergency helpline.

Gas consumers – homes and businesses throughout the UK – have many gas supply companies to choose from. The supply companies pay the gas shippers who buy gas and arrange for it to be transported.


Your gas supplier is responsible for providing a meter and organising for your meter to be read. You should contact your gas supplier for any issues regarding your gas meter. You will find contact details for your gas supplier on your gas bill.

If you do not have a gas meter yet or you cannot find the information on your bill, please call the M Number enquiry line:

0870 608 1524

This call will cost 7p per minute plus your phone company’s access charge. 

Ask them for your MPRN (meter point reference number) which is the unique identifier for your gas supply point and also the identity of the current registered gas supplier at your premises.

Smell gas?

If you smell gas:

  • Call the 24-hour National Gas Emergency Service on 0800 111 999 immediately  

  • Do turn off the gas at the meter unless the meter is in a cellar/basement

  • Don’t smoke or strike matches

  • Don’t turn electrical switches on or off

  • Do put out naked flames  

  • Do open doors and windows

  • Do keep people away from the area affected.

Gas codes

Gas codes are governed by the Uniform Network Code (UNC), which is administered by the Joint Office of Gas Transporters. The UNC is the hub around which the competitive gas industry revolves, comprised of a legal and contractual framework to supply and transport gas. It has a common set of rules for all industry players which ensure that competition can be facilitated on level terms. 

Go to the Joint Office website

Future of gas

Delivering the energy needs of over 23 million customers across the UK affordably, securely and sustainably is an increasingly complex task. As an industry, we all have a role to play in supporting policymakers to make the right decisions for the long and short term to ensure we continue meeting those demands. The Future of gas looks in detail at the key priorities for addressing how gas could, and should, be part of the energy mix.

Go to the Future of gas website