Understanding your offer and the support available to you

We have introduced a new customer support model for Transmission connected customers, designed to provide a more consistent experience throughout the offer review and acceptance process.

Your offer reflects the strongest feasible position based on engineering assessments carried out as part of the programme. Below, we outline the options available to you once you receive your offer, how to raise queries, how to request changes, and the support you can expect during this period.

To see when you can expect your offer, please visit our timeline page.

Distribution connected customers should continue to engage with their DNOs for support, and we will do all we can to assist our DNO partners with any joint queries. Connected customers should continue to engage with their DNOs for support.

While we are working to issue offers as quickly as possible, we cannot provide additional tailored support beyond what is outlined below. Thank you for your understanding. 

• Sign & accept your offer 
• Allow the offer to lapse 
• Reject the offer and move to Gate 1 
• Raise a query regarding an error in your offer 
• Raise a technical query (related to allowable changes at this stage of the process) 
  • Request a change to forward milestones MI5 to MI8 
  • Change your connection date if your project has been advanced
• Other actions that you can take
  • Request a decrease of CEC, TEC, Developer Capacity, Demand MW or Installed Capacity
  • Remove a tech type
  • Novation
  • Address details or admin changes
  • Terminate

These next steps refer Gate 2 and split offers .

Customers requiring an extension to their offer signing deadline (<2028 1 and 2a* protected) 

• For customers who are part of the re-offer process, where material errors have been identified in an initial offer and further work is required by NESO and/or TOs to issue an updated and accurate offer, a four-week extension to the signing deadline will be granted to all affected customers [subject to NESO first agreeing a corresponding extension to the offer to NESO from the TO(s) if and where required]. 
• Where customers have extenuating circumstances that require additional time beyond this four-week extension, or where an extension could in rare cases be required for reasons other than a reoffer due to material errors, requests will be considered on a case-by-case basis. 

Customers are encouraged to review their offers as fully as possible within the first 4 weeks of having received it, even if they are likely to require a re-offer. For example, if there are minor issues which are preventing signing, we encourage you to use the time available now so that you are in a position to sign promptly once any outstanding points are resolved. 

If you wish to request an extension to your signing deadline, please raise this through the Connections Portal. 

This information applies to NESO customers only, including DNOs. Customers whose offers are being issued and managed directly by their DNO should contact their DNO to confirm their applicable signing deadlines. 

Support for customers looking to make changes Mod App change scoping exercise - deadline 10 July 

Through our engagement with you, we have heard that projects may have evolved over this period and that some of you may be considering changes that are difficult to progress within existing processes.

To support this, we launched a Mod App change scoping exercise on 24 June 2026.

We are aware that CUSC modifications are currently being processed, and we believe this exercise supports this in covering the entirety of changes.

This is for customers who have received a Gate 2 notification, whether or not you have received your offer. It provides you with an opportunity to tell us about any changes you are considering. This includes changes that would typically be progressed through Modification Applications, whether under gated or non-gated processes.

As the date of the next window is not yet set, this exercise aims to build a clearer, evidence-based understanding of:

• the types of changes customers are considering
• the scale and volume of potential modification requests
• how we can best support customers to progress their projects while maintaining a fair and workable process

At this stage, this is for information gathering only and will be done through a Microsoft Form. Submitting your details:

• does not constitute a formal Modification Application
• does not guarantee that any changes can or will be processed
• will not affect your current position or existing agreement

We will use the insights gathered to assess what may be feasible and sustainable ahead of future gated windows, and to ensure any next steps are informed by customer need.

This is intended as a one-time scoping exercise to understand the scale of requested changes, so customers must tell us now if they wish to make a change. Any requests made later cannot be incorporated outside of the usual mod app process.

If you would like to take part, please complete this form by 5pm on Friday 10 July 2026

Modification Application change scoping exercise form

We encourage you to provide as much detail as possible. We will review the responses collectively and provide an update once we have assessed the findings. 

A webinar recording covering many common questions on the topic can be found on our webinars and archive page.

Guidance Video

Thank you for your questions on the Mod App scoping exercise. To help, we have recorded a  guidance video (around 30 minutes), covering the purpose of the form and how the information you provide will be used. 

Watch the guidance video

Take a look at the accompanying slides

NOTE: This text was updated on 3 July 2026 to give greater clarity on the purpose of the Mod App scoping exercise.