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Publications library

We've got a wide range of publications offering energy insights and analysis. Download our reports and data to see the innovative ways we are transforming the future of Great Britain’s energy. 

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Reactive power services
February 2025 Power Available report
Report of Power Available signal for February 2025
Document
Data Portal
Supporting data on PN inaccuracies - 2025
This is supporting data for wind market participants involved in the PN inaccuracy project
Document
Reactive power services
January 2025 Power Available report
Report of Power Available signal for January 2025
Document
Data Portal
Supporting data on PN inaccuracies - 2024
This is supporting data for wind market participants involved in the PN inaccuracy project
Document
Reactive power services
Contents TR55
Document detailing Contents for the latest TR55 ERPS tender
Document
Reactive power services
Generic CCGT Agreement TR55
Document detailing Generic CCGT Agreement for the latest TR55 ERPS tender
Document
Reactive power services
Methodology Document TR55
Document detailing Methodology for the latest TR55 ERPS tender
Document
Reactive power services
Generic Steam Agreement TR55
Document detailing Generic Steam Agreement for the latest TR55 ERPS tender
Document
Reactive power services
Invitation Letter TR55
Document detailing Invitation Letter for the latest TR55 ERPS tender
Document
Reactive power services
Guidance Notes TR55
Document detailing Guidance Notes for the latest TR55 ERPS tender
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Publications library

We've got a wide range of publications offering energy insights and analysis.
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Beyond 2030

The Beyond 2030 report builds on the Holistic Network Design (HND) and makes a set of network recommendations throughout the 2030s.
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Future Energy Scenarios (FES)

Future Energy Scenarios (FES) 2024: NESO Pathways to Net Zero represent different, credible ways to decarbonise our energy system as we strive towards the 2050 target.
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Network Options Assessment (NOA)

The Network Options Assessment (NOA) provides our recommendation for which network reinforcement projects should receive investment, and when.
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Clean Power 2030

As the National Energy System Operator (NESO), part of our role is to provide impartial advice to HM Government and the regulator on what is required to securely accelerate the transition away from fossil fuels.
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Electricity Ten Year Statement (ETYS)

The ETYS is our view of future transmission requirements and capability of Great Britain’s National Electricity Transmission System.
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GB 36 Bus electricity transmission network model

The National Electricity Transmission System (NETS) of Great Britain was modelled with precision in DIgSILENT PowerFactory, using a 36-bus equivalent network.
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Markets Roadmap

We are committed to working together with stakeholders as we reform our markets to be fit for a net zero future. We share information on this transition at regular Markets Forums and through our annual Markets Roadmap.
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Summer Outlook

Our Summer Outlook reports are designed to inform the energy industry and support its preparations. They also outline Great Britain’s projected electricity needs for the summer ahead.
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Winter Outlook

The Winter Outlook report presents our view of the security of supply for the electricity systems for the winter ahead.
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Whole electricity system

The journey to creating an energy system fit for the future wouldn’t be possible without close collaboration with industry partners to help the transition.
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System Operability Framework (SOF)

The System Operability Framework (SOF) takes a holistic view of the changing energy landscape to assess the future operation of Britain's electricity networks.
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Regional Development Programmes (RDPs)

RDPs look across the whole electricity system to unlock more network capacity, reduce constraints, and create new revenue opportunities for market participants.