NOA for Interconnectors
Network Options Assessment (NOA)

NOA for Interconnectors (NOA IC) identifies how much interconnection capacity would provide benefit to consumers and other interested parties. It highlights the potential benefits of efficient levels of interconnection capacity between GB and other markets.

The NOA for Interconnectors is different from the main NOA. Rather than assessing proposed projects it evaluates the benefit from hypothetical interconnections.

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Download the NOA publication

Download the latest NOA 2021/22 interactive report.

Read the NOA report

What NOA IC can do

  • Provide market and network assessment of the optimal mix of interconnection capacity.

  • Evaluate the overall benefit to society, by considering the social economic welfare, as well as constraints costs and capital expenditure.

What NOA IC can't do

  • Assess the viability of current or future interconnector projects (the final insights are based on assessing a range of theoretical interconnector options).

  • Provide project-specific information.

NOA IC outcome

This year's analysis has identified a range of potential opportunities for additional interconnection to create both environmental and economic value for Great Britain and Europe. A total interconnection capacity in the range of 18.2 GW to 29.5 GW between Great Britain and European markets by 2041 will provide the maximum benefit for Great Britain consumers. Currently, the total capacity for existing current and future electricity interconnectors with GB regulatory approval is 15.9 GW. Higher levels of intermittent, renewable generation in the FES leads to increased arbitrage opportunities between Great Britain and Europe, particularly in the three scenarios that achieve net zero greenhouse gas emissions by 2050.

GW usage for NOA

Discover more about the NOA

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Network Options Assessment (NOA)

The NOA is our recommendation for which reinforcement projects should receive investment. These projects are major electricity transmission network reinforcements as defined in the NOA methodology.


Investment recommendations

The options that are analysed in the NOA fall mainly into two main groups, asset-based options and ESO-proposed options.

NOA methodology

As a result of stakeholder feedback, we’ve moved the methodology and other content from the publication to our website. This has made the NOA shorter and easier to access.

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Key documents

Have a look at our previous NOA reports, NOA methodologies, NOA Committee minutes and other relevant documents.

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Contact us if you have a question, want to share some insight or have feedback on any part of NOA.