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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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Frequency response services
2024-25 Average Frequency
Average frequency data for the Mandatory frequency response page.
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Frequency response services
current Mandatory Frequency Response Prices
Mandatory Frequency Response Price data
Document
Frequency response services
Mandatory Frequency Response Capabilities
Mandatory Frequency Response Capabilities
Document
Frequency response services
Mandatory Frequency Response Prices
Mandatory Frequency Response Prices
Document
Frequency response services
current Mandatory Frequency Response Capabilities
Mandatory Frequency Response Capabilities data
Document
Frequency response services
Pre-fault frequency control modelling webinar slides
Slides from Pre-fault frequency control modelling webinar
Document
Frequency response services
Dynamic Response Services Service Terms (tracked changes)
The consultation draft of the Service Terms for the Dynamic Response Markets
Document
Frequency response services
Ad hoc C9 & Dynamic Response A18 Consultation Document
Consultation document for the joint ad hoc C9 and Article 18 consultation, that describes the relevant changes and how to reply.
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Frequency response services
Procurement Guidelines Statement v28 effective from 25 June 2025 Tracked Changes for Ad Hoc
This Statement provides tracked change details of updates to the Procurement Guidelines proposed under the Ad Hoc C9 Consultation for industry to review.
Document
Frequency response services
Ad Hoc C9 and Dynamic Response A18 Consultation Proforma
This proforma details the questions NESO would like industry to respond to regarding the proposed updates as part of the C9 ad hoc and A18 consultations.
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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.