ESOS Phase 3 – Annual Action Plan Updates Due December 2025

📋 If your organisation qualified for ESOS Phase 3, you’ll know that compliance doesn’t stop at submitting the original audit. Businesses are also required to deliver and report on an annual update against their ESOS Action Plan, with the first deadline fast approaching in December 2025.

🤔 For Finance Directors, this means ensuring that the identified energy efficiency measures are not only financially viable but also tracked and reported in a way that meets compliance obligations. For Engineering Directors, the focus is on technical delivery—ensuring progress against efficiency improvements is implemented, evidenced, and aligned with the company’s overall sustainability strategy.

⚠️ Failing to provide this update risks non-compliance, potential penalties, and missed opportunities to capture energy and cost savings. With the December 2025 deadline on the horizon, now is the time to review your progress and put the right systems in place.

👉 At GLEG, we specialise in supporting large energy users through ESOS compliance. From action plan tracking to financial and carbon reporting, we help Finance and Engineering leaders stay compliant while unlocking efficiency savings.

Don’t leave compliance to chance—get in touch with us today at hello@gleg.co.uk to ensure your business is on track for December 2025!