Upgrading the electricity transmission network
Autumn 2026This NAO report will review if DESNZ, Ofgem and NESO have presented a robust value for money case for upgrading the transmission network.
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Department for Energy Security and Net Zero 2024-25
Published on:DESNZ spent £6.7 billion in 2024-25 on a range of activities and arm’s-length bodies – an increase of £0.2 billion from 2023-24.
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Energy efficiency installations under the Energy Company Obligation
Published on:Weak controls and oversight blamed for faulty home installations under energy efficiency scheme, affecting tens of thousands of households.
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Department for Energy Security & Net Zero Accounts 2024-25
Published on:The C&AG has issued a clean audit opinion, providing assurance to Parliament on DESNZ’s 2024-25 financial statements.
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Sizewell C
Spring 2026The study will support transparency and Parliamentary scrutiny of Sizewell C, and will review DESNZ’s current and future work on the project.
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UK Emissions Trading Scheme
Published on:This report reviews the UK Emissions Trading Scheme and its progress to date, as well as reviewing future risks and potential difficulties.
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Department for Energy Security & Net Zero 2023-24
Published on:This report provides an introduction to DESNZ and the NAO’s examination of its spending and performance in 2023-24.
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Energy bills support: an update
Published on:Energy bills support successfully protected many people and businesses during 2022 and 2023 from rising energy prices.
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Decommissioning Sellafield: managing risks from the nuclear legacy
Published on:Sellafield nuclear site is not yet achieving value for money due to concerns over project management, the pace of delivery and staffing.
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Achieving environmental improvement and responding to climate change
Published on:This report identifies enablers for success in tackling the challenges government faces in its environment and climate change work.
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Government’s approach to the environment and climate change 2023-24
Published on:This is an overview of the Government’s approach and commitments for environmental improvement, mitigating climate change, and adapting to climate change.
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Carbon Capture, Usage and Storage programme
Published on:Government says carbon capture technology is ‘essential’ to achieving net zero. The government doesn’t have a credible alternative pathway.
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Decarbonising home heating
Published on:The number of heat pump installations by December 2023 was less than half of planned projections; uncertainty regarding the role of hydrogen in home heating is hampering investment and effective planning.
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Department for Energy Security & Net Zero 2022-23
Published on:This guide was produced to support the Energy Security and Net Zero Committee in its examination of the DESNZ’s remit, plans and budget.
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The government’s support for biomass
Published on:Government has provided over £20 billion of support to biomass businesses but it can’t yet demonstrate adherence to its sustainability rules.
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Approaches to achieving net zero across the UK
Published on:Achieving net zero by 2050 in the UK will require co-ordinated action by the UK and devolved governments, due to different challenges faced.
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Update on the rollout of smart meters
Published on:The government has made progress with the rollout of smart meters – but it’s slower than planned and there are challenges in meeting its latest set of targets.
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Support for innovation to deliver net zero
Published on:This report examines the government’s approach to investment in research and innovation to deliver net zero.
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Investigation into Bulb Energy
Published on:There has been a substantial reduction in the potential cost to the taxpayer of supporting the transfer of Bulb Energy to a ringfenced supplier under Octopus, but risks remain.
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Decarbonising the power sector
Published on:This report looks at how DESNZ is set up for power sector decarbonisation while maintaining security of electricity supply, and affordability.