Asked by: Llinos Medi (Plaid Cymru - Ynys Môn)
Question to the Department for Energy Security & Net Zero:
To ask the Secretary of State for Energy Security and Net Zero, when the full Warm Homes Plan will be released.
Answered by Martin McCluskey - Parliamentary Under Secretary of State (Department for Energy Security and Net Zero)
The Warm Homes Plan, which will be published soon will lower bills, strengthen our energy security, and reduce emissions by accelerating the installation of efficient new technologies like heat pumps, heat networks, solar, home batteries and insulation.
The Plan represents the biggest ever public investment in home upgrades. At the Autumn Budget on 26 November, the Chancellor announced an additional £1.5 billion of funding for the Warm Homes Plan, bringing total capital investment to almost £15 billion.
Asked by: Llinos Medi (Plaid Cymru - Ynys Môn)
Question to the Department for Energy Security & Net Zero:
To ask the Secretary of State for Energy Security and Net Zero, with reference to the funding increase by Great British Energy for renewable schemes in Wales announced on 10 December 2025, which body will be responsible for administering this funding to renewable schemes in Wales.
Answered by Michael Shanks - Minister of State (Department for Energy Security and Net Zero)
The Welsh Government will administer the additional funding provided by Great British Energy. This will fund solar panels for schools, leisure centres and museums across Wales, as well as supporting a new scheme which will help public sector and communities complete projects such as solar canopies and battery energy storage.
Asked by: Llinos Medi (Plaid Cymru - Ynys Môn)
Question to the Department for Energy Security & Net Zero:
To ask the Secretary of State for Energy Security and Net Zero, whether the Welsh Government will receive Barnett consequentials from the Warm Homes Plan.
Answered by Martin McCluskey - Parliamentary Under Secretary of State (Department for Energy Security and Net Zero)
Calculating Barnett consequentials of the Government's spending commitments is the responsibility of HM Treasury.
At almost £15 billion, the Warm Homes Plan is the single biggest public investment programme in energy efficiency in UK history. The Treasury has not yet confirmed the total Barnett consequential nor the specific appointment for Wales. More details on the Warm Homes Plan will be published soon.
As issues of energy efficiency, fuel poverty and heat are largely devolved Scotland, Wales and Northern Ireland have specific Net Zero strategies. We work closely with our counterparts in the Devolved Governments to ensure our strategies align.
Asked by: Llinos Medi (Plaid Cymru - Ynys Môn)
Question to the Department for Energy Security & Net Zero:
To ask the Secretary of State for Energy Security and Net Zero, what assessment he has made of the potential impact of changing the inflation indexation in the Feed in Tariffs scheme from Retail Price Index to Consumer Price Index on (a) households and (b) businesses in Wales.
Answered by Michael Shanks - Minister of State (Department for Energy Security and Net Zero)
The Government has consulted on the proposed changes to how Feed-in Tariff payments are adjusted for inflation. The consultation included an analytical annex setting out the assessment of the potential impacts of the policy. An updated version of this will be published alongside a Government Response, next year.
Asked by: Llinos Medi (Plaid Cymru - Ynys Môn)
Question to the Department for Energy Security & Net Zero:
To ask the Secretary of State for Energy Security and Net Zero, what estimate he has made of the average price per kilowatt that businesses receive from suppliers when selling power to the grid under the Smart Export Guarantee compared to domestic households.
Answered by Michael Shanks - Minister of State (Department for Energy Security and Net Zero)
It is a commercial decision for suppliers as to how they choose to set export tariffs, and whether to treat domestic and business customers differently for the purpose of tariffs offered under the Smart Export Guarantee (SEG). Most suppliers offer SEG tariffs that are available to both domestic and business customers, but some do provide distinct tariff offerings.
Details of the tariffs can be found in Ofgem’s SEG annual report. The latest report can be found at the SEG Smart Export Guarantee Annual Report - April 2024 to March 2025 | Ofgem
Asked by: Llinos Medi (Plaid Cymru - Ynys Môn)
Question to the Department for Energy Security & Net Zero:
To ask the Secretary of State for Energy Security and Net Zero, what impact has the decision to designate two AI Growth Zones in Wales had on NESO’s plans for improving grid connections in both (a) north Wales and (b) south Wales.
Answered by Michael Shanks - Minister of State (Department for Energy Security and Net Zero)
Both sites had grid connections being realised before 2030, so are already accounted for in NESO’s planning.
Asked by: Llinos Medi (Plaid Cymru - Ynys Môn)
Question to the Department for Energy Security & Net Zero:
To ask the Secretary of State for Energy Security and Net Zero, what assessment he has made of the impact of the current costs of energy standing charges on businesses in North Wales.
Answered by Martin McCluskey - Parliamentary Under Secretary of State (Department for Energy Security and Net Zero)
The Government has not made such an assessment specific to North Wales. Levels of standing charges in the non-domestic market are a commercial decision for suppliers and are not regulated by Ofgem as they are in the domestic market.
Standing charges predominantly recover ‘fixed’ costs that do not vary by energy use. This includes supplier’s operational costs for serving each customer and the cost of essential network maintenance and upgrades, which are necessary to keep all consumers connected, minimise constraint costs, meet the capacity needed to deliver clean power by 2030, and help bring down bills for households and businesses for good.
We know that too much of the burden of the bill is placed on standing charges, and we are committed to ensuring that standing charges are fair to all consumers.
As part of this, Ofgem have launched a Cost Allocation and Recovery Review to consider how energy system costs can be recovered from consumers in a fairer and more efficient way and government will continue to engage closely with Ofgem on the work.
Asked by: Llinos Medi (Plaid Cymru - Ynys Môn)
Question to the Department for Energy Security & Net Zero:
To ask the Secretary of State for Energy Security and Net Zero, on what date his Department will announce plans for the deployment of new nuclear generation projects at (a) Wylfa and (b) Oldbury.
Answered by Michael Shanks - Minister of State (Department for Energy Security and Net Zero)
Great British Energy – Nuclear purchased the sites at Wylfa and Oldbury in 2024. As sites which have previously hosted a nuclear power station, both have positive attributes for new nuclear. No decisions have yet been taken on any projects to be deployed at either site. Our plans will be set out in due course
Asked by: Llinos Medi (Plaid Cymru - Ynys Môn)
Question to the Department for Energy Security & Net Zero:
To ask the Secretary of State for Energy Security and Net Zero, with reference to the National Audit Office Report entitled Energy efficiency installations under the Energy Company Obligation, published on 14 October 2025, what the cost to the public purse is of remediating defective retrofit work carried out under the Energy Company Obligation scheme in Wales.
Answered by Martin McCluskey - Parliamentary Under Secretary of State (Department for Energy Security and Net Zero)
The remediation costs sit with the original installer and we have been clear that no household should be asked to pay any money to put things right. We expect most remediation for solid wall insulation installed under ECO4 or GBIS to cost between £250 and £6,000 for IWI and £5,000 and £18,000 for EWI. This should be covered by the guarantee should the installer no longer be trading.
Asked by: Llinos Medi (Plaid Cymru - Ynys Môn)
Question to the Department for Energy Security & Net Zero:
To ask the Secretary of State for Energy Security and Net Zero, with reference to the National Audit Office Report entitled Energy efficiency installations under the Energy Company Obligation, published on 14 October 2025, how many homes in Wales have had defective retrofit work carried out on them under the Energy Company Obligation scheme.
Answered by Martin McCluskey - Parliamentary Under Secretary of State (Department for Energy Security and Net Zero)
The Government commissioned an independent statistical audit in April 2025. Two random samples of audits of external (EWI) and internal wall installations (IWI), across the household populations of both schemes were commissioned to understand non‑compliance rates. 98% of EWI audits need to be remediated. For IWI, that number is 29%.
The samples are not large enough to reliably perform any regional analysis. As we continue with further audits, we will seek to begin to collect this data.