The UK’s energy efficiency landscape is rapidly evolving, with new regulations, reporting standards, and efficiency targets set to reshape how organisations manage energy in 2026. From reformed EPCs to mandatory Scope 3 reporting, energy managers face growing complexity alongside the challenge of transitioning to clean technologies.
Graham Paul, Service Delivery Director at TEAM Energy, along with some of the business’s efficiency and carbon-reduction experts, look at the key developments.
According to the Climate Change Committee, over half of the energy used in the UK economy is wasted due to fossil fuel inefficiencies. Electrification and improvements to the built environment will be key to reducing this waste, cutting emissions, and building climate resilience. These changes demand action now; business leaders must integrate upcoming developments into their plans and take early steps to stay ahead.
Energy efficiency ratings in 2026
Organisations should prepare for potential updates to energy efficiency certification requirements. The consultation on the Energy Performance of Buildings (EPB) framework closed in February 2025, and its outcomes are expected soon. Reforms could begin rolling out from 2026, with proposals including:
- Shorter validity periods for Display Energy Certificates (DECs) and their recommendation reports.
- Stricter enforcement mechanisms, such as increased fines for non-compliance with DECs and Air Conditioning Certificates (TM44s).
- While commercial EPC ratings themselves may not change immediately, confirmation of new Minimum Energy Efficiency Standards (MEES) could set the stage for tougher compliance obligations in the future.
Tim Holman, Head of Operations at TEAM Energy
Keeping energy certifications up to date isn’t just about avoiding penalties, it delivers tangible benefits:
- Cost savings through efficiency: Regular assessments highlight opportunities to reduce energy consumption, lowering operational costs.
- Risk mitigation: Staying compliant helps avoid fines and reputational damage, especially as enforcement tightens.
- Future-proofing assets: Meeting or exceeding MEES requirements protects property value and ensures readiness for stricter standards.
- Enhanced sustainability credentials: Demonstrating compliance supports ESG goals and strengthens your organisation’s reputation with stakeholders.
- Operational resilience: Proactive monitoring ensures systems run efficiently, reducing downtime and maintenance issues.
Preparing for UK Sustainability Reporting Standards (UK SRS)
The UK Sustainability Reporting Standards (UK SRS) is set to replace Streamlined Energy and Carbon Reporting (SECR) and TCFD, introducing a more comprehensive and globally aligned framework for sustainability disclosures. Large UK organisations are expected to begin compliance from the 2026/2027 financial year, with requirements covering governance, climate risks, transition planning, and full Scope 1, 2, and 3 emissions reporting.
Unlike SECR, which focused on energy consumption and Scope 1 and 2 emissions without external validation, UK SRS is more ambitious. It is expected to require independent assurance of reported data and forward-looking disclosures such as transition plans. Businesses will need to integrate sustainability and financial reporting, ensuring data is accurate, auditable, and tells a clear narrative about future resilience.
While small and medium-sized businesses are not directly in scope initially, those supplying larger organisations may be asked to provide emissions or sustainability data to support supply chain reporting.
One of the most significant changes is mandatory Scope 3 emissions reporting after the first year of compliance. This shift from voluntary to mandatory reporting means organisations will need robust processes, high-quality data, and systems capable of managing complex ESG requirements.
Tom Anderton, Head of Customer success, shares his insights
MHHS in 2026, what to expect
The Market-wide Half-Hourly Settlement (MHHS) programme is no longer a distant reform, it’s here and accelerating. Following the central system go-live in September 2025, suppliers began migrating customers to half-hourly settlement in October, with the process continuing in waves until May 2027. This transition will move over 30 million electricity meters to a new system that measures consumption every 30 minutes, replacing the old HH/NHH classification and introducing new metering and data service roles. By July 2027, the shortened settlement timetable will be in place, fundamentally changing how energy is billed and managed.
For organisations, this means preparing now. Smart or advanced meters capable of half-hourly readings are essential, and businesses will need robust data platforms to handle 48 data points per meter per day. Greater data granularity will expose inefficiencies and peak usage patterns, creating both challenges and opportunities. While some may face higher costs, MHHS unlocks dynamic pricing, demand-side flexibility, and innovation, helping organisations cut energy, emissions, and costs. Early engagement, system upgrades, and strategic planning will be key to maximising the benefits of this market-wide change.
Robert Webb, Bureau Operations Manager, reveals what this means:
As the largest change to the electricity retail market in a generation, businesses can expect a mix of opportunity and risk.
Why should organisations care about ESOS Phase 4 deadlines?
The Energy Savings Opportunity Scheme (ESOS) is entering its fourth phase, with a qualification date of 31 December 2026 and a compliance deadline of 5 December 2027. While these dates may seem far off, the short window between them leaves little time for organisations to complete audits, gather data, and submit reports. Early preparation is critical to avoid last-minute challenges and ensure compliance.
Phase 4 introduces significant updates, including the removal of Display Energy Certificates and Green Deal Assessments as compliance routes, mandatory reporting on progress against Action Plan commitments, and explanations for unmet goals. Public disclosure of Action Plans and annual progress updates will heighten reputational risks, while non-compliance could lead to fines of up to £50,000 plus daily penalties. Beyond avoiding penalties, ESOS offers strategic benefits, such as energy efficiency improvements, carbon reduction, and a stronger business case for sustainability investments, making early action both a regulatory necessity and a competitive advantage.
Sam Arje, ESOS Lead Assessor at TEAM explains:
Reporting itself is undergoing a step-change, too. Energy managers and business leaders need to now report on their progress toward the commitments made in their ESOS action plans. And if those commitments aren’t met, they’ll have an opportunity to explain why – and in these cases, silence might not be the sensible option.
New Generation Assets and Strategic Energy Planning
Next year, the UK will publish its first Strategic Spatial Energy Plan (SSEP), a major step in prioritising new generation assets across different regions. This plan will influence where energy infrastructure is deployed and how projects align with national decarbonisation goals. At the same time, NESO’s Whole Energy Market Strategy (WEMS) has raised important questions about the financial impact of achieving net zero, including the introduction of Nuclear Regulated Asset Base (RAB) charges.
The SSEP will have far-reaching effects for businesses investing in near- or on-site generation and storage. Projects located in areas identified as strategic for decarbonisation could benefit from streamlined planning processes and stronger alignment with regional energy strategies. Longer-term grid development certainty will also make private wire investments more attractive by reducing risk and improving clarity.
On the financial side, RAB charges will introduce an additional cost for consumers on pass-through contracts. While initially small, these charges could accumulate over time and become significant for large energy users. For those on fixed-price contracts, suppliers are expected to absorb the cost until renewal, after which it will likely be reflected in new quotes. Energy Intensive Industries (EII), however, will be exempt from this additional charge.
Greg Armstrong, Head of Business Change, adds:
So where does that leave us? One thing is clear: the energy efficiency landscape of 2026 demands a proactive, future-focused approach from UK organisations. With regulatory frameworks becoming more ambitious and reporting requirements increasingly rigorous, reactive strategies are no longer viable. Businesses must extend their planning horizons and implement robust systems and processes now to stay ahead.
The reforms to EPB, the shift from SECR to SRS, and the evolution of ESOS all underscore a single truth: comprehensive data, strong partnerships, and early action have moved from being best practice to being essential for compliance and competitiveness.