We own the electricity transmission system in England and Wales. Our networks consist of over 4,000 miles
of overhead line, 870 miles of underground cable and 335 substations.
We own and operate the gas national transmission system in Great Britain which is made up of nearly 5,000 miles of high pressure pipe and 23 compressor stations.
And, we own and operate four of the eight regional gas distribution networks in Great Britain. Our networks
comprise approximately 81,000 miles of gas distribution pipeline.
Changes in the sources and characteristics of generation connecting to our network mean we need to develop the way we balance and operate our network to accommodate these sources, including wind, new and large-scale nuclear generation, and many embedded sources that are connected to local networks and not our transmission grid.
To ensure we continue delivering a safe, reliable and secure gas supply as we develop our asset replacement programmes, we need to make sure we consider the future operational needs of the network. As our thinking around future gas scenarios matures, we continue to explore new opportunities for the use of our asset in powering the economy of the future.
In parallel with developing the gas network of the future, we invest to safely and efficiently operate and improve the network of today.
We will continue to work closely with our customers and stakeholders to adapt our network and our services so we can meet their needs economically and efficiently.
The documents in this section describe various aspects of our plans and strategiesfor developing our networks.
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How long term supply and demand scenarios are used to develop the investment proposals published in the GTYS and FES
The Transmission Losses Strategy and annual Transmission Losses Report are published here and should be used along with the ETYS
Covers our planning processes, including demand forecasting, system reinforcement projects and associated investment as well as actual demands for the previous year
Documents relating to NW GRIP 2013 - a regional statement on long-term gas infrastructure development