We are becoming a separate company

In April 2019, the Electricity System Operator is becoming a separate company within the National Grid Group. Find out more about what this change will mean.

Future of balancing services

As the UK moves to a low-carbon economy, the way we operate the electricity system is evolving. A smart, flexible system that makes the best use of all the energy resources available will enable us to meet our customers’ needs in a balanced, efficient and economical way.

Our aim is to create balancing services markets that meet our changing system needs, and in which all technology types can compete on a level playing field. To achieve this, we will:

  • provide market information that plainly sets out our needs;
  • simplify our products to create transparency; and
  • ensure routes to market for all participants.

We will publish updates on services and system needs via this page. If you would like to be kept informed, please sign up to the mailing list using the link on the right.  

Auction Trial for Frequency Response - Webinar

We are developing a trial of a weekly cleared price auction for a defined volume of our frequency response requirement. This trial will look at testing a number of improvements and new areas of functionality, which will increase market transparency and lower barriers to entry for new providers. We held a webinar on 27th September to provide more detail to the market on how the auction platform will operate.

Watch the webinar presentation here

Click here to download the current Q & A document.


Consultation on Exclusivity Clauses

In the Product Roadmap for Frequency Response and Reserve, we committed to publish and consult industry on revised exclusivity clauses within balancing services contracts.  These clauses place restrictions on what other commercial services, such as those to DNOs, can be provided by parties who are contracted to provide balancing services to the ESO.  This review is also an important element of the Energy Networks Association Open Networks Project, which is facilitating the emergence of Distribution System Operator (DSO) models. 

The consultation is open until 26 October 2018.

Download the consultation letter


Performance Monitoring Policy

As part of the Product Roadmap for Frequency Response and Reserve, we committed to reviewing our policy for testing and performance monitoring of balancing services.  

Download the Policy


Update on Auction Trial

We are going to run a trial to test procurement of a volume of our frequency response requirement next year. The following letter sets out some of the detail in advance of a webinar at the end of September.

Download the Auction Trial letter


Wider Access to the Balancing Mechanism Roadmap 

Our Wider Access to the Balancing Mechanism (BM) Roadmap sets out the commitments and actions to improve existing BM entry routes and create a new route to market. We hope this document will help interested parties understand what they can do now and when specific barriers to entry will be removed. 

Download the Wider Access to the Balancing Mechanism Roadmap


Transmission thermal constraints information note

Our information note provides detail on how we manage thermal constraints on the electricity transmission system currently and how we plan to manage these constraints in future. We also share information on trials with Distribution Network Operators (DNOs) to enable distributed energy resources to provide thermal constraint management services.

Download the thermal constraints information note


Product Roadmap for restoration

Our Product Roadmap for restoration sets out the commitments and actions to improve transparency around Black Start services and to remove barriers to entry to allow improved market access to a broader range of potential participants.

Download the Product Roadmap for restoration


Product Roadmap for reactive power

Our Product Roadmap for reactive power provides greater clarity on our service requirements and our plans to work more closely with our industry partners to improve the shorter term market for reactive power.

Download the Product Roadmap for reactive power

Regional Development Programmes (RDPs)

RDPs look across the whole-system landscape to identify key areas of development to unlock additional network capacity, reduce constraints, and open up new revenue streams for market participants. Find out more on the Regional Development Programmes page.

Product Roadmap for frequency response and reserve

Our Product Roadmap sets out the actions to be taken forward for frequency response and reserve markets and details the principles that will govern the way that balancing services are procured in future. The Product Roadmap also outlines broader improvements to how the SO shares information with the market to enhance transparency of decision making. Insights from across the energy sector have helped to shape the Roadmap through a series of formal and informal consultations.

Download the Product Roadmap for Frequency Response and Reserve

System Needs and Product Strategy (SNAPS)

Our SNAPS consultation provides more information on our future system needs and seeks to consult on how we can best facilitate the evolution of balancing services markets.

Download the System Needs and Product Strategy (SNAPS) document

We hosted two webinars on the SNAPS on 3 July and 7 July 2017. You can download the slides and Q&A from this webinar:



This consultation closed on 18 July 2017. You can find a summary of the main insights by downloading this document: 

Summary of Consultation Responses

As part of our work on product simplification, we have undertaken a process of rationalisation of our existing product suite. The following letter sets out the results of this review, along with a summary of the short term actions we are taking to improve the Firm Frequency Response market.

Letter on Rationalisation

Related documents

16 August 2017 - commercial principles for contracted flexibility: promoting access to markets for distributed energy resources

To manage the electricity system efficiently, we need to make sure distributed energy resources are able to participate in local and national flexibility markets. The Energy Networks Association has published a commercial principles paper that sets out a number of considerations to be addressed, and different models for DER participation in flexibility markets, representing a significant step towards enabling market access for DERs.

You can access the paper via the ENA's website

This paper is a consultation, which closes on 29 September 2017. The response will inform the ENA's Open Network Project deliverables and our work on evolution of balancing services products.

4 August 2017 - Connecting to UK Power Network's South East Coast network - information for distributed energy resources

In our role as Electricity System Operator, we are collaborating with UK Power Networks to trial new ways of working to solve network issues on a whole system basis. Together, we have developed an approach that unlocks further capacity for the connection of distributed energy resources in the South East coast region of England. 

You can download the factsheet here.

This fact sheet sets out what developers of distributed energy resources need to know about constraint management arrangements that will facilitate additional capacity to connect within the South-East Coast distribution network from June 2017 (covering Bolney, Ninfield, Sellindge and Canterbury Grid Supply Points).