Zimmer Biomet Realise Savings of £100k Through ESOS
Zimmer Biomet


Zimmer Biomet manufactures joint implants and provides a range of sterile surgical kits and implants from their main UK site in Bridgend. The production process requires a wide range of equipment and services and incorporates high   precision machining, polishing, coating, sterilisation, quality control and packing for direct distribution to hospitals. In  addition to the direct process use of energy,  the complex manufacturing processes are supported by clean rooms and sterile services requiring exacting standards of operation and maintenance.


Zimmer Biomet manufactures joint implants and provides a range of sterile surgical kits and implants from their main UK site in Bridgend. The production process requires a wide range of equipment and services and incorporates high   precision machining, polishing, coating, sterilisation, quality control and packing for direct distribution to hospitals. In  addition to the direct process use of energy,  the complex manufacturing processes are supported by clean rooms and sterile services requiring exacting standards of operation and maintenance.

ESOS Energy Audit

Zimmer Biomet has been committed to reducing its impact on the environment including the reduction of energy and viewed ESOS as an opportunity to drive further savings. They requested a thorough wide ranging energy survey of the manufacturing and support services for the ESOS programme. This identified significant fast track financial savings, £190,000/year available from rapid payback opportunities (<1 year) for immediate implementation, and a further £115,000/year that could be realised through longer term investments that needed to be incorporated in the long term site development plans.

ESOS/Implementation & Project Management

Opportunities were captured on Briar's B-CoRE database allowing simple and easy tracking and monitoring of progress and savings delivered. Recognising the value of the identified opportunities for the business, Zimmer Biomet commissioned Briar to assist them with project managing the implementation programme. Over the course of a year, Briar worked closely with Zimmer Biomet to advance a programme to deliver in the order of £100,000/year of identified savings. In addition to investment in new lighting the majority of the savings have been achieved through management and operational improvements, operating equipment only when required and improved awareness driven by the department managers.
Zimmer Biomet continue to develop this implementation programme and act as a flag ship for energy reduction within the worldwide group.

Client Comment

“Briar worked closely with our in-house facilities staff to develop the detailed implementation. We are delighted with the savings and this continues our drive for sustainable production....”

David Wintle, Environment Health & Safety Manager

ESOS Delivers Fast Track Savings
Roche Products Ltd


Roche Products UK operates from a 21,200m2 office, meeting and conference facility in Welwyn Garden City, Hertfordshire. The site consists of two buildings which were constructed in 2005 and are fully air conditioned using a combination of ducted fresh air and local chilled beams. The main building is served by a combination of ammonia refrigeration for chilled water and condensing boilers for LTHW heating.

An ALC control system operates the buildings mechanical systems and a Delmatic lighting control system provides main switching of the lighting, supplemented by local switches in meeting rooms and PIR's for out of hours working. The smaller building was originally designed for patient trials and has a total loss ventilation system with no heat recovery.

The buildings are not being utilised as originally designed which provides a number of challenges for the building manager to maintain comfortable conditions. The buildings are over 10 years old and many of the mechanical systems are now approaching the end of their design life, so Roche were keen to use ESOS as a stepping stone to both reduce energy usage and review the systems against present building use.

Electrical Profile—Friday, indicating high base load overnight and weekends

ESOS Energy Audit

The detailed ESOS survey identified a saving of £74,000/year (16%) for a capital investment of £44,500 providing a fast payback in 7 months.

The majority of the savings were achieved through operational change, resetting of BEMS and lighting controls to match the core occupation hours of the building. The controls are already in place and this enables the rapid payback and this reflects the savings that can typically be achieved through reviewing BEMS controls in complex buildings. The reduction in plant operating will significantly reduce electrical loads out-of-hours to deliver immediate savings.

Key projects to deliver savings include the control of ventilation against Carbon Dioxide levels to match occupation, automatic lighting switching to take advantage of good natural light and maximising the use of natural ventilation to reduce fan motive power.

Client Comment

“ESOS has shown us considerable financial savings that will contribute to our drive for sustainable business”.

Joanne Jones (PIEMA), Safety, Health & Environment (SHE) Co-Ordinator

Energy Surveying & Auditing (ESOS)


Energy Savings Opportunity Scheme (ESOS)

esos graphic

Understanding ESOS

ESOS is a mandatory energy assessment scheme enforced by the Environment Agency. It requires qualifying organisations to report on their energy usage every four years. The reporting requirements can be complex, and fines levied for non-compliance.

Our service gives you access to ESOS Lead Assessors. These assessors can oversee the collection and reporting of data for compliance.

Your organisation needs to comply with ESOS for the current reporting phase (up to June 2024) if the following applies:

  1. The company employs 250 or more people or
  2. The company has an annual turnover in excess of £44 million, and an annual balance sheet total in excess of £38 million

Risks & Penalties of Non-Compliance

Penalties for failing to comply fully, or for false or misleading statements can range from between £5,000 and £90,000. The Environment Agency has handed out hundreds of enforcement notices in the first two phases with the names of the companies falling foul of the deadline being named, risking an organisation’s reputation too.

The Environment Agency audits evidence packs and the Phase 2 auditing programme resulted in only 32% of reports being compliant; 63% were compliant with remedials; and 5% were non-compliant.

Unlocking Benefits through ESOS Compliance

Although the requirements of ESOS are complex, the legislation offers an opportunity for organisations to optimise energy efficiency, allowing significant savings on energy spend.

The scheme is estimated to lead to £1.6 billion net benefits to the UK (ESOS Impact Assessment DECC0142, 24 November 2014), with the majority of these being directly felt by organisations as a result of energy savings.


ESOS Phase 3 Deadline Extension

The deadline for compliance has been extended to 5 June 2024. This may seem distant but gathering energy consumption data can be time-consuming, especially if doing this for the first time, or for organisations spread over a number of sites, or those who have undergone a number of significant changes between phases.

If your organisation was in scope for ESOS phase 1 & 2, it is very likely that phase 3 also applies to you too, however, this may not be the case if the size of your company has changed during this time.

Schedule a survey with Briar's ESOS experts and discover the best compliance solutions for your organisation.

Ready to achieve ESOS compliance and optimise your energy usage? Get in touch with our experts today!


Achieving ESOS Compliance: Key Steps and Options

  1. Calculate your total energy consumption
  2. Identify your areas of significant energy consumption
  3. Complete the required audits for one year’s consumption, under the direction of a lead assessor
  4. Submit your ESOS notification of compliance to the Environment Agency
  5. Keep records of compliance in an evidence pack

ISO 50001 can be a route to ESOS compliance. It is a voluntary international standard that applies to organisations of any size, and provides requirements for establishing, managing and improving energy consumption and efficiency. We can guide organisations through the whole process using a practical and attainable approach to achieve certification.

When you choose to engage with Briar for your ESOS reporting, you can rest assured that you will have a team of highly qualified and registered lead assessors by your side. They will carefully review and guide you through the entire process, ensuring that you achieve full ESOS compliance.


Support Available to You

Comprehensive ESOS Audits

Our team of highly skilled energy consultants will conduct a thorough assessment of your organisation's energy usage, identifying areas where significant savings can be made. We will analyse your energy data, review your processes, and provide you with a detailed report outlining cost-effective measures to improve efficiency.

Tailored Energy Efficiency Solutions

We understand that each organisation has unique requirements. Based on the findings from the audit, we will develop a customised energy efficiency plan that aligns with your business goals and budget. Our solutions encompass a wide range of strategies, including equipment upgrades, behavioural changes, renewable energy integration, and more.

Streamlined Compliance Process

Navigating the complexities of ESOS compliance can be daunting. Our team will guide you through every step of the process, ensuring that all necessary documentation is prepared accurately and submitted on time. By partnering with us, you can have peace of mind knowing that your compliance obligations are met efficiently and effectively.


Contact us

To get started, all you need to do is contact us. Give us a call today and you will be connected with one of our knowledgeable ESOS lead assessors. We guarantee that within 15-30 minutes, we will design a customized ESOS strategy tailored to your specific needs. And don't worry, we won't keep you waiting. The same day, you will receive a comprehensive strategy report along with a detailed fee quotation.

Our expert guidance will pave the way for your ESOS compliance journey. Whether you have questions, need assistance, or simply want to ensure that you are ticking every box for energy compliance, we are here to help. You can reach us at 01384 397777 or simply fill out the contact form below.



Download our A to Z guide, which covers everything you need to know about energy compliance. From A for Assessments to Z for Zero Carbon, this guide will ensure that you have all the information you need to stay on top of your energy compliance obligations.

A-Z of Compliance

Are you ticking every box for energy compliance? Download our A to Z guide.

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Energy Savings Opportunity Scheme

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Energy, Carbon and Water Cost Saving
London Borough of Merton


Briar Associates have an excellent reputation for working with Local Authorities to identify and deliver wide ranging energy, carbon and cost savings. Over the last 25 years, we have been engaged to manage many high profile energy efficiency programmes within council offices, schools, libraries, leisure facilities and throughout public sector properties.

Key programmes have included the Collaborative Low Carbon Schools (CLCSS) programme which developed techniques for over 40 Local Authorities to pilot and deliver fast-track energy savings across 500 schools, and the Climate East Midlands, SCoRE programme that worked with all of the 9 East Midlands Local Authorities in an award winning carbon reduction programme.

Energy Audit Programme

London Borough of Merton are one of England’s leading Local Authorities in the promotion and delivery of energy efficiency projects. They appointed Briar Associates to undertake detailed energy and water audits across their corporate building portfolio to identify and quantify cost effective ‘invest to save’ energy, carbon, water and cost saving opportunities. The programme, which was successfully completed in less than 12 months delivered:

• Detailed energy and water audits of over 300 individual buildings across 122 sites

• The identification of over 10,000,000 kWh in energy savings, worth an estimated £721,000 per year

• The identification of over 19,000 m3 of water savings, worth an estimated £38,000 per year

• An overall payback on investment of less than 5 years

The success of the programme has subsequently prompted London Borough of Merton to undertake the ‘Merton Brighter Business Programme’, which is supporting 100 local businesses with free energy audits and grant funding for the installation of new low carbon technologies. Briar Associates have been appointed to manage this project as a result of the success of the original audit programme, combined with our extensive knowledge of the SME sector.

Our focus on identifying practical fast-track energy saving opportunities and assisting SME managers to understand and implement the solutions has added significant valuable to this programme. Briar also continue to support a range of other Local Authorities, Colleges, Academies and private schools to achieve substantial energy and financial savings.

Client Quote

“This complex energy audit programme has been a success and the audit reports have been really useful in enabling the council to identify and target the most cost effective energy, carbon, water and cost reduction opportunities across our corporate building portfolio.”

Damian Hemmings - Climate Change Officer

Energy, Carbon & Financial Saving
Collaborative Low Carbon School Service


Briar have an excellent reputation for working with stakeholders to collaboratively develop resources for energy efficiency and carbon saving. Over the last 25 years, we have been engaged in many programmes and have been privileged to work closely with the Carbon Trust in disseminating energy saving opportunities.

Briar were selected as the lead consultant for the major CLCSS programme on the basis of our 25 years experience working with Local Authorities to drive school energy efficiency and our successful delivery of the Climate East Midlands, SCoRE programme that worked with all of the 9 East Midlands Local Authorities in an award winning carbon reduction programme.

CLCSS Programme

CLCSS collaborated with over 40 Local Authorities across England to develop, pilot and deliver fast-track energy saving tools to enable estates and sustainability staff to assist their network of schools to deliver savings. The tools focused on practical enabling activities to deliver and demonstrate savings and were created to be used by the whole school community. A few of the key tools developed include:

  • Schools energy & carbon monitoring & benchmarking tool
  • Fast-track saving, whole school resources
  • Taking control of your heating resource
  • Getting the benefit from AMR
  • Invest-to-Save - Project Identification tool

The programme achieved a demonstrated 14% £1.1M p.a. saving in energy consumption across the 500 pilot schools, with some schools saving over 30% energy consumption. More importantly, the programme drove a plethora of activities within the school community, engaging pupils in sustainability and energy saving.

This programme transferred knowledge and expertise to the Local Authority, sustainability staff and it is pleasing that many of the CLCSS programmes continue to roll-out the resources to their school network. Briar continue to support a range of Local Authorities, Colleges, Academies and private schools to achieve substantial energy and financial savings.

Pupil participation

This has proved to be an extremely effective way to reduce energy consumption.

Paul Charlton, Director of Support Services, Fairfax School


This has helped our continued efforts to reduce costs and contribute to the sustainability of our school.

Ian Harrison, Building Manager, Coppice & Langley School

School case study

Energy, Carbon & Financial Saving
Display Energy Certificate Optimisation


The Department of Energy & Climate Change (DECC) works to secure clean, reliable energy supplies for the UK and to mitigate Climate Change. Their HQ, at 3 Whitehall Place, London, provides office space for approximately 1,000 staff and is a Grade 2 listed, intensively serviced, air conditioned building.

The offices, like the majority of intensively serviced city centre buildings, achieved a poor ‘G’ rated, 165 OR, energy performance Display Energy Certificate. DECC were committed to achieving a radical improvement on this performance and have advanced a range of initiatives.

Department of Energy & Climate Change—Carbon Reduction Strategy

Briar have worked closely with DECC to provide specialist energy engineering support to drive a carbon reduction strategy.

This programme was commenced with detailed energy and BMS control audits, these identified a wide range of technical measures for implementation as well as operational changes to the existing Building Management and Lighting Control systems. The commitment of the teams at DECC to reducing energy consumption has been excellent and this has facilitated aggressive reprogramming of the BMS with plant hold-offs, seasonal operation and maximum use of free cooling.

We have also project managed the implementation of a wide range of low carbon infrastructure measures, including a dedicated chiller to serve the IT rooms that enabled substantial saving through the shutdown of the central chilling plant. The installation of a range of LED lighting in the restaurant, lifts, reception, corridor, stairwells and service areas. Further projects have included the provision of a dedicated boiler for summer hot water provision and waste heat recovery to the kitchen ventilation exhaust.

Briar also provide a bureau service to optimise the Display Energy Certificate, this updates on the progress achieved and provides a projection of the future annual DEC performance on a monthly basis. Over a 4 year period, DECC have successfully reduced their energy consumption and carbon emissions by over 50% and achieved a ‘C’ rated DEC at 74 OR. This is an exceptional performance in a fully air conditioned building and demonstrates the commitment of their teams to reducing carbon emissions.

DEC Performance Improvement Graph

  • Building audited March
  • Initial operational improvements—May
  • Phase 1 BMS Reprogramming— Aug

Carbon Performance 

  • 2008 Base Year
  • 2009 March, Audit
  • 2009 May, Commence implementation
  • 2012—50+% Savings “C” Rated DEC

Energy Efficient Lighting
Queen Mary University of London

Project Overview

Queen Mary University, London is one of the UK's leading research-focused higher education institutions. With around 17,800 students, 4,000 staff and an annual turnover of £300m, it is one of London’s largest Universities.

The University has a Salix Finance fund for investment in energy and carbon saving projects. Briar Associates assisted in identifying Salix compliant projects, providing mechanical & electrical design and project managing installation contractors.

Existing fluorescents
New LED lighting

Library LED Lighting

One project involved replacing the library lighting with more energy efficient luminaires and improving lighting controls. Mainly T8 fluorescent tube lights were replaced with LED alternatives (by Apollo). In addition new PIR controls (by Setsquare) were installed to provide presence based control in the bookshelf aisles.

Energy Performance

Monitoring of electricity consumption on the existing and new lighting has demonstrated energy savings of over 70% and a financial saving of over £4000 per month is being realised. This has exceeded our business case projections.

Project Complexity

Maintaining appropriate illumination levels was important so lighting design was crucial to ensure replacement luminaires provided a suitable environment for study and user comfort. The installation work was carried out during summer holidays, however the library remained operational throughout, so careful phasing of works and good communication with library users and managers was vital.

Client Comment:

Kerry Horvath, Energy Reduction Manager at Queen Mary University of London said “It’s great to achieve a significant energy saving while maintaining a high quality study environment. The new lighting has gone down well with our library users”