Select committee inquiry
Decarbonising the power sector
Closed
What the inquiry looked at
“In October 2021 the Government set a target to decarbonise the power sector by 2035, subject to security of supply. But demand for electricity is expected to increase significantly in that timeframe as other sectors, such as transport and heating in buildings, switch to electricity to reduce emissions. Decarbonising in these circumstances will require the Government to manage a range of complex challenges, including ensuring the right mix of technologies, attracting investment in new generation energy, and modernising energy networks. This inquiry is based on the National Audit Office (NAO) investigation into decarbonising the power sector . The Committee will question senior officials at the Department for Business, Energy & Industrial Strategy on how it is set up to achieve power sector decarbonisation while maintaining security of electricity supply and affordability for consumers and taxpayers. The Committee’s inquiry will include: government’s vision for a decarbonised power sector; government’s understanding of what is required to achieve a resilient and decarbonised power sector; and how government recognises and is managing risks to resilience and affordability in a decarbonised power sector. If you have evidence on these issues please submit it here by Monday 13 March 2023. Please have a look at the requirements for written evidence submissions and note the Committee cannot accept as evidence material that has been published elsewhere.”
The committee's words, from the inquiry page on parliament.uk ↗.
What it found
In the committee's words, from the summary of Fifty-Ninth Report - Decarbonising the power sector ↗
Decarbonising the power sector by 2035 is a massively ambitious undertaking, and vital to achieving net zero overall by 2050. In practice, this means that government expects all electricity will come from low-carbon sources by 2035, subject to maintaining security of supply (that is, no blackouts). Demand for electricity is also forecast to more than double over the next two decades as more sectors switch from fossil fuels to electricity.
With only 12 years left to hit its ambition, the Department for Energy Security and Net Zero has a lot to do if it is to achieve its ambition, and do so at least cost to bill payers and taxpayers, all while ensuring security of supply so that the lights stay on.
The Department has published a range of strategies and plans that set broad ambitions for the power sector, including the 2021 Net Zero Strategy, 2022 British Energy Security Strategy, as well as sector-specific plans such as the 2021 Hydrogen Strategy. Together with ongoing reviews of market arrangements for buying and selling electricity, and new draft legislation, the range of activities constitute a substantial number of very important energy projects and programmes. The Department should bring these together in a coherent delivery plan so that it can understand how realistic its ambition is, and coordinate and sequence its interventions to best effect.
A delivery plan would also provide confidence to the private sector. This will be essential as government will rely on private investments worth hundreds of billions of pounds in new and upgraded infrastructure. Recent energy policy instability, energy windfall tax and the stop-start nature of some initiatives, such as the Green Homes Grant Voucher Scheme, have eroded investor confidence in government. This confidence is yet more critical now given the scale of spending expected in the European Union and the United States of America on decarbonising their power sectors, risking a flight of capital investment away from the UK.
The Department must also successfully influence other departments with responsibilities relevant to power sector decarbonisation, but has limited levers to do so. Influencing consumer behaviour too, as well as improving energy efficiency measures, could also play a significant role in reducing overall electricity demand, particularly during peak use periods. However, the government does not have clear plans on the demand side, and recent energy bills support schemes have prioritised reducing costs to consumers over reducing demand for energy.
What the government said
The government responded on 24 September 2023. The deadline was 21 August 2023.
Summary written by Accountability Index from the government's response.
The government agrees with five of the Committee's recommendations on decarbonising the power sector and disagrees with the recommendation on publishing the likely cost impact on bill payers and taxpayers in the delivery plan.
- On an integrated delivery plan, the government agrees and "intends to publish one later in the year", with a target implementation date of December 2023.
- On annual updates to Parliament, the government agrees (target date December 2023), saying it already provides annual updates through its responses to the Climate Change Committee's Progress Reports.
- On private sector clarity, the government agrees and "plans to publish further roadmaps for other sectors that need private sector investment later in 2023".
- On publishing cost impacts for bill payers and taxpayers, it disagrees, stating that future costs are "naturally subject to uncertainty" and depend on future policy decisions. It currently publishes cost estimates in Impact Assessments.
Read the government's response ↗ Read the report ↗ Report an error
How the inquiry ran
Each dot is a dated item listed on this page, from the inquiry's opening on 30 January 2023 to its close on 24 September 2023. The dashed mark is the deadline Parliament records for the government's response.
- Oral evidence 23 Mar 2023
- Report 21 Jun 2023
- Government response 24 Sep 2023
- Correspondence 2 letters
What it recommended 3 recommendations · 20 conclusions
2Provide annual updates to Parliament on progress towards energy objectives and risk mitigation.
Concluded (the committee's words)
We are sceptical that plans for expanding nuclear, solar and wind power are credible. Government has set itself highly challenging electricity generating capacity ambitions for nuclear (24GW by 2050), solar (70GW by 2035) and offshore wind power (50GW by 2030). By comparison, the UK’s current operating capacity is less than a quarter of each of these ambitions. For example, its nuclear ambitions include a mix of large stations as well as so-called SMRs, a type of smaller reactor untested in the UK and not operating at scale anywhere in the world. The Department considers it worth pursuing this (and other nascent technologies) to ensure the UK has a range of options from which to select its ultimate power generating mix, and is not over- reliant on any single technology. The Department is creating Great British Nuclear to build capacity, expertise and a regulatory regime to expand its nuclear pipeline; however, in the last two decades, government has only agreed one project which has entered construction, at Hinkley Point C. The Department also says it is tracking offshore wind projects at various stages of development that could produce 80GW of electricity when operating. Should these projects generate this much electricity, the Department would exceed its ambition for offshore wind power; however, it acknowledges that not all these projects will succeed. Recommendation 2: The Department should provide annual updates to Parliament that demonstrate progress against milestones towards its objectives and identify how significant risks are being mitigated. 6 Decarbonising the power sector
3Set out plans to provide greater clarity to the private sector for decarbonisation investment.
Recommended (the committee's words)
We are not convinced that government is providing enough clarity to the private sector to attract the investment that is necessary to build infrastructure, spur innovation and drive competition to lower costs. Government estimates that hundreds of billions of pounds in public and private investment will be needed to decarbonise the power sector, and private investment will be a major component of that. The Department considers that the UK has the market mechanisms, business models and regulation to provide investor confidence. Recently, in what the Department considers a signal to the sector, the Chancellor announced in the Spring Budget £20 billion for carbon capture, usage and storage. However, this technology is untested at scale in the UK, and this Committee has seen how previous government attempts to get it off the ground have failed repeatedly. The Department also points to competitions for contracts for difference as key to driving innovation in offshore wind, reducing expectations of its cost in 2025 from £125 per megawatt hour in 2012 to £50 today. It considers that the regularity of contract for difference auctions provides certainty to investors. However, government changes and policy inconsistency erode investor confidence and increase the cost of capital. Recommendation 3: The Department should set out in the delivery plan due later this year how it will provide greater clarity to the private sector to encourage the investment it needs to decarbonise the power sector.
4Set out strategies to influence other departments for power sector decarbonisation collaboration.
Recommended (the committee's words)
It is not clear the Department has the support it needs from other departments to achieve government’s power sector decarbonisation ambition. While it holds responsibility for, and takes the lead for achieving energy security and net zero, the Department nevertheless must rely on wider government to achieve its objectives. The Department has offshore wind, hydrogen, electricity network and nuclear champions whose role includes identifying potential barriers, such as local planning issues and availability of the necessary skills in the workforce. Other departments are responsible for such wider issues, including the Department for Levelling Up, Housing and Communities for planning arrangements and the Department for Education for skills in the workforce. It is essential that, as the lead department for its objectives, it builds partnerships across government to successfully influence these and other relevant departments. However, this can be tricky when power sector decarbonisation activities may be in tension with other departments’ other priorities. Recommendation 4: The Department should set out in its Treasury Minute response how it will influence other departments to ensure they collaborate and prioritise activities in pursuit of power sector decarbonisation.
5Publish delivery plan information on decarbonisation cost impact for energy bill payers and taxpayers.
Recommended (the committee's words)
The Department has not yet set out how it expects decarbonising the power sector will impact energy bill payers and taxpayers. While government recognises that initially it will rely heavily on private investment to fund the clean energy transition, the costs to build, maintain and operate the power system are typically passed onto consumer bills. The Climate Change Committee has estimated that future capital expenditure costs will increase running up to 2035 and then decrease along with operating costs, and government has estimated that £280 to £400 billion of public and private investment in new generating capacity will be needed by 2037. However, the Department has not yet assessed what this ultimately means for energy bill and taxpayers. Energy affordability, driven by unprecedented wholesale gas prices, has Decarbonising the power sector 7 been a significant contributor to the current cost-of-living crisis. In the future, how energy is bought and sold will depend on the outcome of the government’s ongoing Review of Electricity Market Arrangements. The Department expects reform of the retail market to result in more scope for suppliers to offer new tariffs that accommodate consumer demand flexibility, so bill payers can opt to reduce their bills by increasing their energy use when demand is lower. Recommendation 5: The Department should publish in the delivery plan due later this year information on when and how the costs of decarbonising the power sector are likely to have an impact on energy bill payers and taxpayers, and update this regularly when new information becomes available that changes the cost profile.
6Write to Committee setting out demand assumptions for energy efficiency and consumer behaviour policies.
Concluded (the committee's words)
We are not yet clear what the Department’s plans are in respect of energy efficiency and consumer behaviour. The Department acknowledges that improving energy efficiency and changing consumer behaviour are key to meeting net zero. However, recent energy bills support schemes have prioritised reducing costs to consumers over encouraging reduced demand for energy. In the 2022 Autumn Statement, the Chancellor announced new funding of £6 billion from 2025 to 2028 to improve energy efficiency for households, businesses and the public sector. The Chancellor announced that an Energy Efficiency Taskforce would be charged with improving energy efficiency in the UK by reducing energy consumption from buildings and industry by 15% by 2030 compared to 2021 levels. In March 2023, government announced a further £1.4 billion to support energy efficiency, including for low- income households. However, government’s track record in implementing energy efficiency schemes is patchy at best. In December 2021 we reported that such schemes were often fragmented, and that stop-start policy was an obstacle to long- term progress towards government’s energy efficiency ambitions. It is not clear what energy efficiency and consumer behaviour assumptions the Department used when modelling pathways to a decarbonised power sector. In February 2022 we reported that government often over-estimates consumer buy-in to its policies, including those aimed at reducing emissions. Recommendation 6: Alongside its Treasury Minute response to this report, the Department should write to the Committee setting out the demand assumptions it has used in its modelling and how this reflects policies and plans to promote energy efficiency and influence consumer behaviour. 8 Decarbonising the power sector 1 Government’s plans to decarbonise the power sector
1Committee takes evidence from Department on power sector decarbonisation report.
Concluded (the committee's words)
On the basis of a report by the Comptroller and Auditor General, we took evidence from the Department for Energy Security and Net Zero (the Department) about decarbonising the power sector.1
7Regulatory system for nuclear energy insufficient to deliver government's ambitious pipeline.
Concluded (the committee's words)
In the last two decades, government has only agreed one nuclear project, at Hinkley Point C.18 The government is now creating Great British Nuclear to help it build capacity and expertise, and a regulatory regime aimed at expanding its nuclear pipeline and help it 7 Department for Business, Energy & Industrial Strategy, Net Zero Strategy: Build Back Greener, 19 October 2021; Department for Business, Energy & Industrial Strategy, British Energy Security Strategy, 7 April 2022; HM Treasury, Net Zero Review: Analysis exploring the key issues, October 2021; HM Government, The Energy White Paper: Powering our net zero future, CP 337, December 2020; Department for Business, Energy & Industrial Strategy and Ofgem, Transitioning to a net zero energy system: Smart Systems and Flexibility Plan, July 2021; Department for Business, Energy & Industrial Strategy, UK Hydrogen Strategy, CP 475, August 2021. 8 Q 68 9 Q 25; Department for Energy Security & Net Zero, Review of Electricity Market Arrangements: Summary of responses to consultation, March 2023; draft legislation 10 Qq 23, 28, 112 11 Qq 23, 27 12 Qq 24, 26–27, 109–110; C&AG’s Report paras 9–11 13 Climate Change Committee, Progress in reducing emissions: 2022 Report to Parliament, June 2022 14 Qq 23–27 15 Department for Business, Energy & Industrial Strategy, Net Zero Strategy: Build Back Greener, 19 October 2021 16 Q 32 17 C&AG’s Report, Figure 2 18 C&AG’s Report, para 1.9 10 Decarbonising the power sector achieve its ambitions for this technology.19 We received written evidence from the Nuclear Industry Association that regulation and safety are at the heart of the sector, but that, the current system would not work efficiently or quickly enough to deliver government’s ambitions.20 These ambitions include overseeing the deployment of a mix of large ‘gigawatt’ stations such as Hinkley Point C (which is under construction and due to produce up to 3.2GW when it starts operating), and small modular reactors (so-called SMRs)
8Offshore wind project pipeline could exceed ambition, but not all expected to succeed.
Concluded (the committee's words)
The Department also told us that it is tracking offshore wind projects at various stages of development that could produce 80GW of electricity when operating, more than its 50GW ambition. However, it acknowledged that not all these projects would succeed. It told us that it has established an offshore wind champion and acceleration taskforce to identify barriers to this technology. The Department also told us that it works closely with The Crown Estate, and Crown Estate Scotland, which have responsibility for seabed leasing on which offshore windfarms are sited.23 It noted that the contracts for difference mechanism has resulted in increases in offshore wind capacity from 1GW in auction round one to 7GW in auction round four.24 Providing clarity and confidence to private investors
9Uncertainty creates investment hiatus despite billions needed for power sector decarbonisation.
Concluded (the committee's words)
The government estimated in its 2021 Net Zero Strategy that £280 to £400 billion of public and private investment in new generating capacity would be needed by 2037 to decarbonise the power sector. These costs represent the construction costs for power generation only, and do not include the costs for all aspects of decarbonising the power sector, such as network construction or research and innovation on technologies.25 Private investment will be a major contributor to the financial capital required to decarbonise.26 A clear delivery plan could increase the confidence of investors to fund new infrastructure, which could reduce their costs of capital.27 We received written evidence from Energy UK that flagged a negative impact on investment in the UK, given it is seen as less favourable when compared to the USA and EU, and spoke of a coming ‘investment hiatus’ in the UK due in large part to uncertainty.28 The Department believes that the UK will never be able to compete financially with the USA; however, it believes the UK has the market mechanisms, business models and regulation to provide confidence to investors and attract the necessary investment.29 19 Qq 5, 41; C&AG’s Report, Figure 8 20 DPS0013 21 Qq 5–7; C&AG’s Report para 1.9 and Figure 8 22 Qq 7, 32, 42, 74; C&AG’s Report, paras 1.13 and 2.6 23 Q 39 24 Q 40 25 Department for Business, Energy & Industrial Strategy, Net Zero Strategy: Build Back Greener, 19 October 2021, page 99; C&AG’s Report, para 6 26 C&AG’s Report, para 2.17 27 Q 88; C&AG’s Report, para 11 28 DPS0019 29 Q 88 Decarbonising the power sector 11
10Contracts for Difference mechanism effectively reduced offshore wind costs and spurred investment.
Concluded (the committee's words)
The Department told us that its role is to enable competition to drive innovation and cost reduction, and that the best example of this is how contracts for difference have sustained investment and innovation from the private sector in offshore wind. It told us that costs fell far faster and more steeply than anyone was expecting. As an illustration, an assessment by the previous Department for Energy and Climate Change in 2012 estimated a cost of £125MW/h in 2025. The Department’s current estimate for that period is £50MW/h.30 It considers that the regularity of annual contracts for difference auctions will provide the industry with the confidence it needs to continue to invest and develop new project proposals.31
11Government's ambitious CCUS strategy remains untested at scale despite significant investment
Concluded (the committee's words)
At the 2023 Spring Budget, the Chancellor announced £20 billion for carbon capture, usage and storage (commonly referred to as CCUS).32 However, while providing a signal to the sector and investors, this technology is untested at scale in the UK. The Department acknowledges that its current ambition for CCUS to capture 30 megatons by 2030 is hugely ambitious; however, it considers that its current plan is more ‘holistic’ than previous attempts. By this it means that different carbon emitting sources, carbon capture projects, and transport and storage infrastructure are clustered, and that this will make an important difference compared to previous attempts that were focused around one type of power-based carbon emitter, with expectations that industrial emitters would follow later.33 We received written evidence from The Carbon Capture and Storage Association that indicated a number of key policy decisions and legislation still required in this parliament for government to achieve its CCUS deployment ambitions.34 This Committee has seen how previous government attempts to get CCS (carbon capture and storage) off the ground have repeatedly failed, and in 2017 we reported that ‘Halting CCS’s deployment means that the UK will have to pay billions of pounds more to meet its decarbonisation targets, has missed opportunities to be at the forefront of a growing global industry, and has damaged investors’ confidence in working with the government on CCS in the future.’35
12Inconsistent government energy policy undermines investor confidence and hinders decarbonisation progress
Concluded (the committee's words)
More generally, changes in policy direction can affect investor confidence in government.36 Energy policy instability, such as the stop-start nature of some initiatives like the Green Homes Grant Voucher Scheme, which was extended and then abruptly closed, have eroded investor confidence in government.37 In March 2022 we highlighted that, in this Committee’s recent reports into Achieving Net Zero (HC 935), Environmental tax measures (HC 937), Low emission cars (HC 186) and the Green Homes Grant Voucher Scheme (HC 635), government has too often pursued stop-start strategies which undermine confidence for business, investors and consumers.38 30 Q 32 31 Qq 39–40 32 Q 59 33 Q 57–8 34 DPS0018 35 HC Committee of Public Accounts, Carbon Capture and Storage, Sixty-fourth Report of Session 2016–17, HC 1036, April 2017 36 C&AG’s Report, para 11 37 Qq 34, 88; HC Committee of Public Accounts, Green Homes Grant Voucher Scheme, Twenty-Seventh Report of Session 2021–22, HC 635, December 2021 38 HC Committee of Public Accounts, Achieving Net Zero: Follow up; Forty-First Report of Session 2021–22, HC 642, March 2022 12 Decarbonising the power sector Government collaborating to achieve its ambition
13Department for Energy Security & Net Zero has limited levers to influence other departments
Concluded (the committee's words)
On 7 February 2023, the government announced that the Department for Business, Energy & Industrial Strategy (BEIS) would close, and its responsibilities would transfer to new departments, including the Department for Energy Security & Net Zero (the Department).39 The Department therefore takes the lead for energy security and net zero, and is responsible for achieving the government’s decarbonised power sector ambition.40 It believes that the machinery of government changes that led to its creation provide it with the focus and bandwidth it needs to lead decarbonising the power sector, both now and to scale-up activity in future.41 Nevertheless, it must rely on and successfully influence other government departments and organisations to help it to achieve its power sector decarbonisation ambitions, when it has limited levers to do so.42
14Skills shortages and planning system issues hinder energy sector decarbonisation progress
Concluded (the committee's words)
The Department has created offshore wind, hydrogen, electricity network, and nuclear champions whose role includes identifying potential risks, barriers and bottlenecks to progress and making recommendations for both the Department and other parts of government where issues cross departmental responsibilities. Planning permission and skills in the workforce are two relevant issues.43 The Department for Levelling Up, Housing and Communities is responsible for planning arrangements.44 The Department told us that the planning system is a key enabler, and that 60% of the nationally significant infrastructure projects over the next decade will relate to energy (such as generating infrastructure or networks).45 The Department for Education is responsible for skills in the workforce, particularly at the entry level.46 In written evidence received from the Local Government Association, it told us that across England, by 2050, there could be 1.18 million jobs in low-carbon sectors; but that the workforce currently lacks the right skills to meet this future demand and the short-term funding landscape does not provide the certainty for businesses and education providers to invest in the training and skills required to decarbonise energy.47
15Cross-Whitehall collaboration challenged by competing departmental ambitions and long-term skills gaps
Concluded (the committee's words)
The Department told us that it is essential that it builds strong partnerships and collaborative relationships with relevant departments across Whitehall, and that it works with No. 10 and the Cabinet Office to ensure that departments are aligned.48 However, other departments and organisations have their own issues and competing ambitions.49 The Department told us that a shortage of skills in, for example, the nuclear industry would take many years to address.50 39 C&AG’s Report, footnote 2 40 C&AG’s Report, para 3 41 Qq 30–31 42 Qq 2, 31, 104–106 43 Qq 26, 104 44 Q 26 45 Qq 27, 47–48 46 Q 106 47 DPS0031 48 Qq 2, 31 49 Q 106 50 Q 49 Decarbonising the power sector 13 2 Energy efficiency, consumer behaviour and the costs to consumers The impact of decarbonising the power sector on energy bill payers and taxpayers
16Significant investment in power sector lacks clear assessment of spending timelines and funding
Concluded (the committee's words)
While government has estimated that £280 to £400 billion of public and private investment in new generating capacity will be needed by 2037, it has not yet assessed when there may be periods of higher spending and how this will be paid for, particularly if consumer bills remain high due to wholesale prices.51 Since privatisation in the 1980s and 1990s, the power sector has largely relied on private investment for building and renewing infrastructure.52 The cost of building, maintaining and renewing the system therefore tends to fall to consumer energy bills rather than taxation.53 The Climate Change Committee has estimated that future capital expenditure costs will increase to £18 billion a year running up to 2035, and then decrease along with operating costs. It has also estimated that from 2044 onwards, the annual operational cost savings are projected to more than offset the annual additional capital investment required for electricity generation.54
17Nascent technologies for decarbonisation will incur significant costs for taxpayers and consumers
Concluded (the committee's words)
We questioned the Department as to how it is planning to protect consumers and taxpayers from the cost of decarbonising the power sector, particularly when a challenge of proceeding quickly is that deploying nascent technologies before there is a competitive market for them, requires taxpayer support. The Department told us that it is seeking to achieve its objective at least cost to the consumer, but confirmed that nascent technologies such as CCUS and small nuclear reactors will result in significant cost for both taxpayers and energy bill payers. It added that bill payers are not currently paying anything up-front for renewables, or the nuclear power station under construction at Hinkley.55 However, it confirmed bill payers would, should it go ahead, pay for a new nuclear power station at Sizewell before it is operational, using a form of financing called a regulated asset base that it believes would be cheaper in the long run.56
18Long-term consumer bill reductions from renewables seem inconsequential amid high wholesale prices
Concluded (the committee's words)
Although the Department was unable to tell us when bill payers would see lower bills as a result of investment in zero and low-carbon generating infrastructure, it highlighted recent analysis by Ofgem that renewables funded by contracts for difference are reducing annual household bills by an average of £54.57 However, it acknowledged that in the context of recent unprecedented high wholesale gas prices, which are contributing to the increased cost-of-living, the benefit to consumers may seem inconsequential.58 The Department highlighted that, as the electricity system accommodates more projects with contracts for difference, this reduction in bills should increase.59 51 Department for Business, Energy & Industrial Strategy, Net Zero Strategy: Build Back Greener, 19 October 2021; C&AG’s Report, para 2.18 52 C&AG’s Report, para 2.17 53 C&AG’s Report, paras 12, 2.17 54 Q 89; C&AG’s Report, paras 1.15–1.16, Figure 10 55 Qq 87, 90–91 56 Qq 90–92 57 Q 92 58 Qq 93–94 59 Qq 89, 92–94 14 Decarbonising the power sector
19Department exploring fundamental electricity market reform to reduce long-term consumer costs
Concluded (the committee's words)
The Department is also currently considering fundamental market reform of how electricity is bought and sold, through which it hopes to reduce costs of electricity to consumers over the long term. The Department expects reform of the retail market to result in more scope for suppliers to offer flexible tariffs, for their customers to benefit from cheaper electricity when demand is lower.60 Reducing electricity demand through energy efficiency and consumer behaviour
20Energy bill support schemes prioritise cost reduction over encouraging demand efficiency
Concluded (the committee's words)
Government’s Net Zero Strategy expects a 40% to 60% increase in electricity demand by 2035 as more modes of transport and heating switch to electricity from fossil fuels.61 The Department told us it is expecting a corresponding increase in electricity generation from roughly 300TWh (a terawatt-hour is a unit of power) today to between 450TWh and 485TWh by 2035.62 Reducing peak electricity demand by encouraging households and businesses to be more efficient and flexible in how and when they use electricity reduces the maximum generating and network capacity required.63 The Net Zero Strategy states that promoting more ambitious and sustained demand reduction and energy efficiency measures to reduce overall power demand is key a factor in reducing the delivery risk of achieving net zero.64 However, recent energy bills support schemes, such as the Energy Price Guarantee, have prioritised reducing costs to consumers over encouraging reduced demand for energy.65 In November 2022 we recommended that the Department needed to ensure that administrative issues did not prevent support being provided to vulnerable households in a timely manner.66 We have recently reported that the Department introduced the Energy Price Guarantee support scheme quickly, within three weeks, but that wider reform of electricity markets (through the Review of Electricity Market Arrangements) would not be implemented until the mid-2020s.67
21EPC rating C requirement implementation faces ongoing cost-effectiveness and affordability debate.
Concluded (the committee's words)
We asked the Department about its plans to encourage consumers, industry and households to invest in greater energy efficiency. It told us that this is an important aspect of its strategy, which includes encouraging short-term demand flexibility from consumers to use less electricity at times of peak demand (by, for example, turning appliances off), as well as energy efficiency measures. The Department indicated that, for example, a requirement to ensure properties are at least EPC rating C has resulted in an increase in the homes achieving this standard from 14% in 2010 to 47% now. However, it told us the EPC rating C requirement depends on implementing it being cost-effective, affordable and practical to do so, and in the private rented sector there is an ongoing policy debate as to whether there is a maximum landlords should pay.68 60 Qq 35, 85 61 Department for Business, Energy & Industrial Strategy, Net Zero Strategy: Build Back Greener, 19 October 2021, page 78 62 Qq 81–83 63 C&AG’s Report para 1.13 64 Department for Business, Energy & Industrial Strategy, Net Zero Strategy: Build Back Greener, 19 October 2021, para 43 65 Q 28 66 HC Committee of Public Accounts, Regulation of energy suppliers, Twenty-Fifth Report of Session 2022–23, HC 41, November 2022 67 HC Committee of Public Accounts, Energy bills support, Fifty-eighth Report of Session 2022–23, HC 1074, June 2023 68 Q 38 Decarbonising the power sector 15
22Government's energy efficiency initiatives plagued by fragmented, stop-go implementation track record.
Concluded (the committee's words)
In its 2022 Autumn Statement the Chancellor announced new funding of £6 billion from 2025 to 2028 to improve energy efficiency for households, business and the public sector. The Chancellor announced that an Energy Efficiency Taskforce would be charged with improving energy efficiency in the UK by reducing energy consumption from buildings and industry by 15% by 2030, compared to 2021 levels. The Department told us that the Taskforce would align incentives across the private sector, households and government. In March 2023, government announced a further £1.4 billion to support energy efficiency, including for low-income households.69 However, government does not have a successful track record of implementing energy efficiency measures. In December 2021, we reported that government has previously implemented a number of energy efficiency schemes aimed at private domestic housing, for example The Green Deal and the Renewable Heat Incentive, and this fragmented, stop-go activity has hindered stable long-term progress towards government’s energy efficiency ambitions.70
23Significant uncertainty remains regarding consumer behaviour change for power sector decarbonisation.
Concluded (the committee's words)
We also asked the Department about how government can influence consumer behaviour. The Department told us that its modelling of power sector decarbonisation by 2035 covers different pathways characterising different assumptions of consumer behaviour and energy efficiency (such as home storage), but acknowledged that it does not know which of those pathways we are on.71 We reported in March 2022 that significant uncertainty remains as to whether consumers will rapidly change their behaviours in line with the expectations of government’s Net Zero Strategy, and that government has a poor track record of engaging consumers, including over-estimating buy-in to its policies.72 69 Qq 33–34 70 HC Committee of Public Accounts, Green Homes Grant Voucher Scheme, Twenty-Seventh Report of Session 2021–22, HC 635, December 2021 71 Q 37 72 HC Committee of Public Accounts, Achieving Net Zero: Follow up, Forty-First Report of Session 2021–22, HC 642, March 2022 16 Decarbonising the power sector
Evidence
Oral evidence sessions 1
- 23 Mar 2023Decarbonising the power sector3 witnesses, listed belowparliament.uk ↗
Who gave evidence 3 witnesses
- Ashley IbbettDirector General, Trade, Europe and Analysis, Department for Business, Energy and Industrial Strategy
- Jeremy Pocklington CBPermanent Secretary, Ministry of Defence
- Jonathan MillsDirector General, Energy Markets and Supply, Department for Energy Security and Net Zero
Correspondence 2 letters
- 11 Jul 2023Correspondence from James Armstrong, Managing Partner, Bluefield Partners LLP, re Bluefield Partners LLP submission to Public Accounts Committee inquiry, dated 28 June 2023
- 17 Apr 2023Correspondence from Jeremy Pocklington CB, Permanent Secretary, re follow up questions eaised at the Public Accounts Committee on the NAO Office report on Decarbonising the Power Sector, dated March 2023