- Conservative-commissioned analysis finds Labour's Clean Power 2030 plan will cost £320 billion more than alternative approach by 2050.
- Costs include £137 billion in grid upgrades, £94 billion in lost carbon tax revenue, £67 billion in system balancing and £22 billion in generation subsidies.
- Report from think tank Onward, originally commissioned by former Energy Secretary Claire Coutinho, was shelved by Ed Miliband upon taking office.
- Alternative pathway prioritizes gas and nuclear over wind and solar, potentially cutting household bills by £200 annually by 2035.
- Current decarbonization policies have already cost the public over £200 billion in the past two decades.
The hidden price tag of net zero
A bombshell economic analysis has revealed that the Labour government's Clean Power 2030 Plan will saddle British households and businesses with an additional £320 billion in energy costs by 2050, compared to a more balanced approach favoring gas and nuclear generation. The report, produced by the economic think tank Onward, was originally commissioned by former Conservative Energy Secretary Claire Coutinho in 2023 to calculate the full system costs of fully decarbonizing the United Kingdom's electricity supply. Energy Secretary Ed Miliband shelved the analysis upon taking office for Labour, but Onward completed the work independently, publishing its findings this week.
Four pillars of excess cost
The £320 billion in additional costs across the 20-year analysis period breaks into four distinct categories. Network spending will require £137 billion more due to the intermittent nature of wind and solar generation, which forces supply to be located farther from demand centers and requires more extensive transmission infrastructure.
Lower wholesale electricity prices would save £94 billion if carbon taxes were removed from the system. Currently, carbon taxes add approximately £8 billion annually to electricity bills, with £3 billion flowing to government coffers and £5 billion representing windfall profits for non-gas generators, primarily renewable operators.
System balancing and ancillary services add £67 billion in costs as grid operators must pay wind and solar farms to switch off during overproduction and compensate standby gas plants and battery storage when the wind does not blow. The National Energy System Operator has already forecast balancing costs of £7 billion by 2030, a £5 billion increase from current levels.
Generation subsidies and the Capacity Market account for £22 billion in additional spending, as renewable projects require long-term contract guarantees to attract investment.
Historical context: A legacy of expensive policy
Britain already carries the burden of the world's highest electricity prices among developed nations, a direct result of what the Onward report describes as "deliberate policy choices to prioritize an electricity grid dominated by wind and solar at any cost." Decarbonization policies have already cost the public well in excess of £200 billion over the past two decades, with this year alone adding over £20 billion – equivalent to more than £700 for every household in the country.
The report draws a historical parallel to the 1977 Stepping Stones report prepared for Margaret Thatcher's opposition, which identified trade union power as the fundamental obstacle to British economic recovery. Today, the Onward analysis argues, sky-high energy costs have replaced union power as the "consistent stumbling block to Britain's challenges," hampering manufacturing competitiveness, artificial intelligence development and biotechnology investment.
The alternative: Cheaper power, cleaner results
The Conservative-backed alternative pathway would prioritize a diversified mix of nuclear, gas generation and renewables, building a power system that responds to demand rather than forcing consumers to adapt to weather-dependent generation. This approach would reduce system costs by 20% by 2040 compared to the current trajectory.
Crucially, the analysis argues that cheaper electricity produces better environmental outcomes. Only 10% of UK emissions come from the electricity grid, with the remaining 90% from transport, heating and other sectors. High electricity prices deter consumers from adopting electric vehicles and heat pumps, which the report's foreword, written by Coutinho, calls "bad climate policy."
"Sending our industry overseas to more polluting countries and creating a barrier for consumers to adopt electricity at home is worse for global emissions," the report states. "There is no point in having the cleanest electricity in the world, if nobody can afford to use it."
Response and rebuttal
Energy Secretary Miatta Fahnbulleh dismissed the Onward analysis without engaging its technical details, offering instead a statement about investing in clean energy jobs and cutting tax on electricity bills. The climate advocacy group Carbon Brief attempted a "factcheck" of the report, but critics noted that many of its criticisms relied on disputing assumptions that Onward had drawn directly from government sources.
The Carbon Brief criticism included the claim that Onward had assumed "low gas prices," when in fact the analysis used the government's own assumptions based on international gas prices from the previous year. Even at current elevated levels, the marginal cost of gas generation remains lower than contract prices for new offshore wind farms.
A crossroads for British energy policy
The Onward analysis presents British policymakers with a stark choice between two futures. One path pursues ideological purity in electricity generation, imposing hundreds of billions in costs that will further raise already record-high energy prices and deter the electrification of transport and heating. The other path prioritizes affordability, using a pragmatic mix of generation sources to deliver cheaper power that consumers can actually afford to use for cars, heating and industrial processes.
The Conservative plan, however, contains its own contradictions. While promising to scrap net zero targets, the party still embraces electrification goals that would require hundreds of billions in grid investment. Energy analysts warn that running gas plants primarily as standby backup, rather than as baseload generation, reduces their efficiency and adds system costs. The result, critics suggest, could be a "mongrel energy system" that satisfies neither affordability nor environmental objectives.
What remains clear is that Britain's energy policy has entered a defining moment, with the cost of past decisions now coming due and the price of future choices becoming visible for the first time.
Sources for this article include:
Please contact us for more information.