According to the statutory instrument published on legislation.gov.uk, the Contracts for Difference (Definition of Eligible Generator) (Amendment) Regulations 2026 were made on 16 July 2026 and came into force on 17 July 2026. The measure amends the 2014 regulations that define who counts as an ‘eligible generator’ for the purposes of Chapter 2 of Part 2 of the Energy Act 2013. The operative change is short but precise. Regulation 2 adds the continuation of electricity generation by an existing nuclear power station to the list of activities that count as carrying out a generating activity. In plain terms, existing nuclear stations are now expressly included in the eligibility wording rather than being left to implication.
That matters because the 2014 regime uses the definition of an eligible generator as the legal gateway into the Contracts for Difference system. The explanatory note says regulation 3 already covered a person who intends to carry out a generating activity in relation to an eligible generating station. The 2026 amendment changes that gateway by stating that continued generation at an existing nuclear plant is one such activity. For policy readers, the distinction is important. The instrument does not rewrite the wider CfD regime. It changes one definition within the existing structure. That means the amendment broadens the legal wording on eligibility, but it does not by itself award support or settle any later commercial terms.
The legislative route is set out on the face of the instrument. The Secretary of State made the regulations under sections 6(1) and 10(3) of the Energy Act 2013, after consulting the persons listed in section 24(1) of that Act and any others considered appropriate. The text also states that regard was had to the matters in section 5(2) of the 2013 Act. Parliamentary approval was required. The instrument records that a draft was laid before Parliament and approved by a resolution of each House under section 6(8)(b) of the Energy Act 2013. For professionals tracking process as well as substance, that confirms this was not a minor administrative correction but a change passed through the affirmative procedure.
The regulations extend to England and Wales, Scotland and Northern Ireland. There is no long lead-in period. Because the amendment came into force on the day after it was made, the revised definition has applied across the UK since 17 July 2026. That timing is likely to matter for operators, advisers and market participants reviewing current eligibility positions. Where internal assessments relied on the earlier wording in the 2014 regulations, those assessments may now need updating to reflect the express inclusion of existing nuclear generation.
The most directly affected parties are operators of existing nuclear power stations. Before this amendment, the legislation did not expressly refer to the continuation of generation at an existing nuclear station. After the amendment, it does. That is the immediate legal benefit created by the instrument. The practical effect should still be described carefully. The legislation itself only changes the threshold definition. Whether any station benefits in practice will depend on how the wider Contracts for Difference regime is applied in later decisions, including any future contractual or administrative steps taken under the Energy Act 2013 framework. That reading follows from the narrow drafting of the amendment and the explanatory note published with it.
The policy signal is limited but still notable. By adding existing nuclear stations to the definition, the Department for Energy Security and Net Zero has removed uncertainty around whether continued generation can sit within the same eligibility rules used for CfD purposes. In technical schemes, small definitional changes can have significant downstream effects. The accompanying note also states that a proportionate analysis of costs and benefits has been produced and published alongside the instrument. That suggests the department treated the change as more than routine housekeeping, even though the operative amendment is concise. It also places this instrument within a longer sequence of amendments to the 2014 regulations, following further changes made in 2021, 2022 and 2025.
For professionals following energy regulation, the main takeaway is straightforward. From 17 July 2026, UK law expressly treats the continuation of generation by an existing nuclear power station as a generating activity for the purpose of the eligible generator definition in the Contracts for Difference rules. For the wider public, the significance is easier to state in plain English. The government has adjusted a technical gateway rule so that existing nuclear stations can be recognised within this support framework. The amendment is brief, but its importance lies in what it removes: doubt over whether continued nuclear generation at an existing station could count at all under the earlier wording.