Suitability for third party delivery and tendering assessment overview

To support the potential introduction of competition for third party delivery, the ESO assess the suitability of projects for competition in accordance with published tendering criteria. This late competition model role applies to Network Options Assessment (NOA) wider network reinforcements that we recommend and also new connections or modifications to existing connections that arise from applications. For each set of options, we identify the most relevant options and assesses these options against the tendering criteria, which requires the options to be:

  • new

  • separable

  • high value.

Some options will clearly not meet the criteria for competition, for instance because their value is far below the threshold, meaning not all options are assessed for competition.

Ofgem's document Guidance on the Criteria for Competition gives further information.

In Summer 2021 BEIS consulted on their proposed next steps to introduce legislation to enable third parties to deliver investment on the transmission network. The latest information on this is available on their website.

Learn more about the NOA methodology

NOA methodology

The NOA methodology describes how we assess the required levels of network transfer, the options available to meet this requirement and recommends options for further development.

The NOA process

Learn how and why the NOA Process is conducted each year. It includes how we evaluate onshore and offshore reinforcement options.

NOA for interconnectors

See how the NOA Process is conducted for interconnectors.

Suitability for third party delivery and tendering assessment

Learn more about how we apply the competition assessment criteria for NOA options.

ESO process for high voltage and stability management

This section covers the NOA Pathfinder voltage and stability assessments.

Early development of options and Interested Person’s process 

Read how we increase the diversity of options considered by collaborating the use of the early development of options and IP process.