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  1. Energy prices

    Work in progress

    Winter 2026/27

    Our study will look at how DESNZ and other bodies are taking into account the impact of their decisions on current and future energy bills.

  4. Decarbonising home heating

    Report Value for money

    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.

  5. Sizewell C

    Report Value for money

    Published on:

    This report assesses the implications of the Sizewell C construction deal for taxpayers, electricity consumers, and investors.

  6. Energy bills support: an update

    Report Value for money

    Published on:

    Energy bills support successfully protected many people and businesses during 2022 and 2023 from rising energy prices.

  7. Update on the rollout of smart meters

    Report Value for money

    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.

  8. Investigation into Bulb Energy

    Report Value for money

    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.

  9. Energy bills support

    Report Value for money

    Published on:

    BEIS worked quickly to introduce financial support for rising energy bills (currently estimated at £69bn), recognising it had to make compromises.

  10. The energy supplier market

    Report Value for money

    Published on:

    This report examines the recent exit of energy suppliers from the market and government’s role in managing the exits.

  11. Green Homes Grant Voucher Scheme

    Report Value for money

    Published on:

    This report examines the performance, implementation, procurement and management of the Green Homes Grant scheme.

  15. Green Deal and Energy Company Obligation

    Report Value for money

    Published on:

    The Department of Energy and Climate Change’s Green Deal design not only failed to deliver any meaningful benefit, it increased suppliers’ costs – and therefore energy bills – in meeting their obligations through the ECO scheme.

  16. The energy supplier market

    Press release

    Published on:

    This report examines the recent exit of energy suppliers from the market and government’s role in managing the exits.

  17. Ofgem – Social Action Plan and Household Energy Efficiency

    Report Value for money

    Published on:

    Sir John Bourn, Head of the National Audit Office, today welcomed Ofgem’s efforts to help vulnerable consumers, such as the elderly or those on benefits. He encouraged Ofgem and the energy suppliers to build on the Social Action Plan to allow more vulnerable consumers to take advantage of the competitive energy market. He also reported […]

  18. Green Homes Grant Voucher Scheme

    Press release

    Published on:

    This report examines the performance, implementation, procurement and management of the Green Homes Grant scheme.

  20. Update on the rollout of smart meters

    Press release

    Published on:

    A National Audit Office (NAO) report updating on government’s ambition to rollout smart meters across Great Britain