Climate advisors set out roadmap for UK decarbonisation by 2050

The UK must cut greenhouse gas emissions by 87% by 2040 to meet its legally binding 2050 net-zero target, according to the Climate Change Committee’s (CCC) latest advice. As part of its recommendations for the Seventh Carbon Budget, the CCC has set a proposed emissions limit of 535 MtCO2e for 2038-2042 and outlined a ‘Balanced Pathway’ to achieve this goal.

The independent advisory body’s plan identifies electrification and low-carbon electricity as the primary drivers of emissions reductions, accounting for 60% of the total cuts needed by 2040. Key technologies – including electric vehicles (EVs), heat pumps, and renewable energy – must now be delivered at scale. The CCC notes that the required roll-out rates are comparable to past UK transitions, such as the widespread adoption of mobile phones, refrigerators, and internet connections, demonstrating that large-scale shifts in technology adoption are feasible with the right policy and infrastructure in place.

A major shift outlined in the report is the adoption of heat pumps. Currently installed in just 1% of UK homes, heat pumps would be used in around half of all homes by 2040 under the CCC’s pathway. This requires the annual installation rate to rise from 60,000 in 2023 to nearly 450,000 by 2030 and around 1.5 million by 2035. However, the transition would align with natural replacement cycles, meaning heating systems are only replaced at the end of their lifespan. From 2035, all new and replacement heating systems would need to be low carbon.

Industry is also expected to see a major shift, with the proportion of industrial energy demand met by electricity rising from 26% today to 61% by 2040. Industrial processes would be powered by electric boilers, ovens, and furnaces, as well as electric heat pumps. The CCC suggests this transition could help UK manufacturers capitalise on the growing demand for low-carbon goods.

The committee projects economic benefits from the transition, including lower household costs. If the Balanced Pathway is followed, annual household energy bills could be around £700 lower by 2050, with driving costs also falling by a similar amount. Reducing fossil fuel dependence is also expected to improve energy security, making UK households 15 times less sensitive to future gas price spikes.

The report breaks down emissions reductions by sector:

• Transport (27%) – Nearly all new cars and vans electric by 2030.
• Homes (14%) – Widespread adoption of low-carbon heating, mainly heat pumps.
• Electricity supply (12%) – Expansion of offshore wind and other renewables.
• Industry (11%) – Large-scale electrification of industrial heat processes.
• Agriculture and land use (7%) – Sustainable farming practices and lower livestock numbers.
• Aviation (5%) – A shift to sustainable aviation fuels and pricing measures.

The CCC estimates that most investment in low-carbon infrastructure will come from the private sector, with public spending not exceeding 2% of total government expenditure.

Professor Piers Forster, interim chair of the CCC, comments: “Decarbonisation now needs to go beyond the power sector. Action across transport, buildings, industry, and farming will create economic opportunities, tackle climate change, and lower household bills.”

The CCC’s recommendations will inform the Seventh Carbon Budget (2038-2042), which the government must decide on by June 2026. The decisions made will shape the UK’s long-term trajectory towards net zero.

Responding to the CCC’s 7th carbon budget, Trevor Hutchings, CEO, Renewable Energy Association (REA):

“We welcome the momentum today’s advice from the CCC provides, as it clarifies the route forward for the UK’s decarbonisation path, emphasising this is achievable and affordable for the country.

“The recognition that renewable and clean technologies are vital to decarbonising the UK’s economy in a cost-effective way is an important message from today’s publication. So now is the time to work at speed towards net zero and to secure the jobs, investment, environmental and energy security benefits which will flow from this.

“While we need to better understand the CCC’s treatment of some renewable technologies, we look forward to engaging with them and with the Government on the implementation of the Carbon Budget recommendations.”

Madeleine Gabriel, director of sustainable future at Nesta:

“The Climate Change Committee’s latest advice unveils a robust pathway to net zero at lowest cost. It is clear that heat pumps are the most cost-effective way to cut carbon pollution from UK homes.

“Net zero is within the UK’s grasp only if home heating is tackled in the right way. The CCC has provided much-needed clarity about the solutions, but the government must not miss the boat in delivering the policies and programmes needed to make this happen – including the 3 million heat pumps and low-carbon heating systems that need to be installed in this Parliament. We have clear direction now, including that hydrogen is not viable for home heating, and the UK cannot afford more years of consultations, pilots and stalling. The most important first step is for the government to focus on ways to make electricity cheaper, such as by rebalancing the levies that artificially push electricity bills up.”

Read the CCC’s report: The Seventh Carbon Budget – Advice for the UK government