AwardedAwarded 31 July 2026
Maentwrog Hydro Power Station Optimisation Services
Nuclear Decommissioning Authority · Central government
In brief
Nuclear Decommissioning Authority awarded architecture and engineering and energy work to GridBeyond Limited on 31 July 2026.
The notice gives a value of £1,092,000 excluding VAT.
The contract runs for 2 years, up to 4 years with extensions, starting 25 May 2026.
The buyer says it is suitable for small and medium-sized businesses.
Built from the notice's own fields. Always check the official notice before you bid.
What the notice says
NDA is a non-departmental public body charged, on behalf of government, with the mission to clean-up the UK’s earliest nuclear sites safely, securely and cost effectively. We’re committed to overcoming the challenges of nuclear clean-up and decommissioning, leaving the 17 nuclear sites ready for their next use. We do this work with care for our people, communities and the environment, with safety, as always, our number one priority. We also play an important role in supporting government’s aspiration for the UK to be a global leader in the civil nuclear sector. We strive to deliver best value for the UK taxpayer by focusing on reducing the highest hazards and risks, while ensuring safe,…Read the full description
NDA is a non-departmental public body charged, on behalf of government, with the mission to clean-up the UK’s earliest nuclear sites safely, securely and cost effectively. We’re committed to overcoming the challenges of nuclear clean-up and decommissioning, leaving the 17 nuclear sites ready for their next use. We do this work with care for our people, communities and the environment, with safety, as always, our number one priority. We also play an important role in supporting government’s aspiration for the UK to be a global leader in the civil nuclear sector. We strive to deliver best value for the UK taxpayer by focusing on reducing the highest hazards and risks, while ensuring safe, secure, and environmentally responsible operations at our sites. We seek ways to reduce the level of public funding from government by generating revenue through our commercial activities.
Maentwrog Hydroelectric Power Station (“Maentwrog”) is a 28MW hydroelectric plant owned by NDA and operated by Magnox Limited (“Magnox”).
The NDA is seeking to engage with economic operators obtain feedback regarding a forthcoming tender to appoint an economic operator to deliver energy generation and trading optimisation services for the NDA's Maentwrog Hydropower station asset. The core service to be delivered includes, but is not limited to the provision of trading available energy generation capacity within the wholesale market, based upon fundamental and technical analysis, market expertise and available generation capacity based upon water volumes, rainfall and available measurements within defined operational parameters.
The aim of this procurement is to increase income generation to support the NDA in delivering it's mission.
It is anticipated that the agreement may be based upon a 2 year initial term with 2 twelve month optional extensions.
It is anticipated that the total contract value will be circa £240,000 and £500,000 for the initial term, with a potential income value between £480,000 and £800,000 across a potential total 4-year term, subject to Supplier performance. Please note, we appreciate that income will change based upon market conditions and fluctuations, therefore these are indicative estimates.
Who won
| Winner | Value | Dates |
|---|---|---|
| GridBeyond Limited 1 bid received | £1,092,000 | 5 October 2026 to 4 October 2028 |
| GridBeyond Limited 1 bid received | £1,092,000 | Awarded 21 July 2026 |
Values as the award notice gives them, excluding VAT where stated.
Timeline
- Tender notice · UK4, notice 002854-2026
- Contract award notice · UK6, notice 068694-2026
- Contract details notice · UK7, notice 072589-2026
About the buyer
Nuclear Decommissioning AuthorityLast 12 months
Procurements
82Awards
62Suppliers it has used most for architecture and engineering
- Energus1 contract
- GridBeyond Limited1 contract
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From notice 002854-2026 on Find a Tender, first published 13 January 2026, last updated 31 July 2026. We last checked for changes on 28 September 2026.