ESG Assurance Firms in Birmingham, UK: Companies and Services Guide (2026)
AC
Acumon Chartered Accountants·12 min read
This practical guide presents a selection of companies offering ESG assurance services in Birmingham and to organisations across the wider region. Rather than ranking companies, it gives a neutral overview of their ESG assurance capabilities, client focus, and related areas of expertise. The selection ranges from large companies with broad audit, sustainability, and risk capabilities to more focused specialists working with specific reporting, verification, or assurance requirements. The aim is to give readers enough context to understand what each company offers, where its strengths lie, and which type of organisation it may suit.
Acumon
Acumon is a UK firm of chartered accountants and registered auditors providing ESG assurance, statutory audit, risk, accounting, tax, and advisory services to organisations across the UK. Its ESG assurance work focuses on independent review of sustainability information, selected ESG metrics, reporting processes, and the controls behind published disclosures.
The firm supports organisations that need greater confidence in environmental, social, and governance information used by boards, investors, lenders, customers, and other stakeholders. Its ESG assurance engagements can cover greenhouse gas emissions, energy consumption, workforce data, governance statements, and other selected sustainability disclosures.
Acumon approaches ESG assurance through an audit-led framework. The firm reviews the processes used to gather ESG information, tests underlying data, assesses selected disclosures, and provides independent limited assurance where appropriate. This can be relevant to Birmingham organisations that want external scrutiny of sustainability information without limiting the engagement to financial reporting.
The firm also provides ESG reporting readiness reviews for organisations that are not yet prepared for formal assurance. These reviews examine data ownership, reporting processes, controls, and gaps between current reporting and stakeholder or regulatory requirements, with practical remediation steps identified before an assurance engagement begins.
Environmental reporting is another area of focus. Acumon reviews greenhouse gas and energy reporting methodologies, including emission factors, estimation methods, reporting boundaries, year-to-year consistency, and information prepared in connection with Streamlined Energy and Carbon Reporting requirements.
Acumon does not currently list a Birmingham office, but it supports clients across the UK through its UK-based team. Its current office network includes London, Pitstone, Aylesbury, Bournemouth, and Aberdeen, making the ESG assurance service available to Birmingham organisations that do not require their assurance team to be physically based in the city.
ESG Assurance Capabilities
Acumon provides ESG assurance across selected sustainability metrics, disclosures, reporting methodologies, and supporting controls.
These include:
Independent limited assurance over selected ESG metrics and disclosures
Greenhouse gas emissions and energy reporting reviews
Streamlined Energy and Carbon Reporting methodology assessments
ESG reporting readiness reviews
Data-gathering and internal controls assessments
Workforce and governance disclosure assurance
Supply-chain and lender ESG questionnaire support
Assurance work can therefore focus on individual ESG indicators or extend to the processes and controls used to produce wider sustainability reporting.
Regulatory Licences and Registrations
Acumon operates within a regulated UK audit framework that supports its wider assurance work.
These include:
ICAEW Registered Audit Practice status
FRC authorisation for Public Interest Entity audits
Jersey Recognised Auditor status
Isle of Man Recognised Auditor status
FCA exempt professional firm status
These registrations support assurance work under established audit quality and independence frameworks and allow Acumon to work with UK organisations as well as groups containing entities in Jersey and the Isle of Man.
Core Services
In addition to ESG assurance, Acumon provides services that connect sustainability reporting with wider financial reporting, governance, risk, and compliance requirements.
These include:
ESG assurance
ESG reporting readiness reviews
Greenhouse gas and energy methodology reviews
Statutory external audit
Group and subsidiary audits
Public Interest Entity audits
Risk and technology assurance
Internal controls and governance support
Accounting, tax, and advisory services
Acumon can combine ESG assurance with statutory audit where this is appropriate while maintaining independence where a separate assurance engagement is required. Its broader audit and advisory capabilities can also support issues identified during reviews of ESG reporting processes and controls.
Acumon works with organisations that are:
Preparing selected ESG disclosures for independent assurance
Strengthening sustainability data collection and reporting controls
Reviewing greenhouse gas and energy reporting methodologies
Preparing for more formal ESG reporting requirements
Responding to sustainability information requests from lenders or supply-chain partners
Integrating ESG information into wider governance and reporting processes
A readiness review can be used before formal assurance to identify weaknesses in data ownership, documentation, reporting processes, and controls that could otherwise affect the assurance engagement.
Address: 1-2 Craven Road, Ealing, London, W5 2UA, UK
PwC UK
PwC provides non-financial assurance covering sustainability and ESG information, including carbon and other environmental reporting. Its work can address the reliability of reported information, reporting processes, controls, and selected metrics rather than being limited to financial statements.
For Birmingham organisations, PwC has a city-centre office at One Chamberlain Square. Its combination of local audit capacity and broader sustainability assurance resources may suit larger businesses, listed groups, financial institutions, and organisations dealing with multiple reporting frameworks or stakeholder requirements.
Address: One Chamberlain Sq, Birmingham B3 3AX, UK
LinkedIn: www.linkedin.com/company/pwc-uk
Facebook: www.facebook.com/PwCUK
Instagram: www.instagram.com/pwc_uk
Deloitte
Deloitte provides sustainability assurance and reporting services for organisations that need independent review of ESG information and non-financial disclosures. Its UK practice covers assurance over sustainability metrics, greenhouse gas emissions, climate-related disclosures, workforce data, and other environmental and social indicators. The company provides limited and reasonable assurance under standards including ISAE 3000 and ISAE 3410, depending on the engagement scope.
Deloitte also supports ESG assurance readiness through gap analysis, reporting assessments, and reviews of existing metrics and disclosures before formal assurance begins. Its wider sustainability work includes ESG reporting advisory, climate-related reporting, sustainability-linked finance assurance, and support around major reporting frameworks. Deloitte has a Birmingham office at Four Brindleyplace, giving organisations in the region access to its wider UK sustainability and audit practice.
Key Facts
Ideal for: Organisations managing complex data environments
Specialization: Technology risk and regulatory compliance
Location: UK offices
Contact Information
Website: www.deloitte.com
Phone: +44 (0)121 632 6000
Address: Four Brindleyplace Birmingham, B1 2HZ United Kingdom
LinkedIn: www.linkedin.com/company/deloitte
Facebook: www.facebook.com/deloitteuk
Twitter: x.com/deloitteuk
Menzies LLP
Menzies provides ESG assurance alongside sustainability, accounting, audit, and advisory services. Its ESG work includes independent assurance over sustainability data and reporting, carbon footprint verification, governance and risk reviews, and assessments connected with environmental reporting requirements.
The firm can also carry out gap analysis and readiness work where sustainability information is not yet prepared for independent assurance. Menzies has a Birmingham office in The Colmore Building, giving local companies an option outside the largest international audit networks.
KPMG’s UK sustainability assurance practice provides independent verification and assurance over ESG information and sustainability disclosures. Engagements can include readiness work before external assurance, followed by limited or reasonable assurance under recognised standards where the reporting subject is suitable.
Its Birmingham office at One Snowhill provides a local base for organisations seeking ESG assurance alongside financial audit, governance, reporting, climate, and broader sustainability expertise. This combination can be relevant where sustainability reporting is becoming part of established corporate reporting and control processes.
Assurance levels: Limited and reasonable assurance where appropriate
Focus: ESG disclosures, sustainability metrics, reporting processes, and controls
Location: One Snowhill, Birmingham
Suitable for: Businesses integrating ESG information into broader corporate reporting and assurance frameworks
Contact Information
Website: kpmg.com
Phone: +44 (0)121 232 3000
Address: One Snowhill, Snow Hill Queensway, Birmingham B4 6GH
LinkedIn: www.linkedin.com/company/kpmg-uk
Twitter: x.com/kpmguk
Facebook: www.facebook.com/KPMG
Crowe UK
Crowe provides independent sustainability assurance as part of its wider audit, risk, and sustainability offering. Its published ESG work includes assurance over annual sustainability reporting, CDP-related information, and information connected with sustainability-linked lending arrangements.
The company also supports sustainability disclosures and reporting preparation. Crowe has established a presence in central Birmingham at One Colmore Row, while its broader Midlands practice provides audit and advisory services across the region.
Grant Thornton provides ESG and non-financial assurance covering sustainability information, greenhouse gas reporting, and other non-financial disclosures. Its offering includes assurance readiness work as well as independent engagements under ISAE 3000 and ISAE 3410.
The Birmingham practice operates from 103 Colmore Row. This makes Grant Thornton a locally accessible option for privately owned businesses, corporate groups, public sector organisations, and other entities that want ESG assurance from a firm that also handles statutory audit, accounting, tax, and risk work.
RSM provides non-financial assurance across a broad set of ESG indicators. Its published assurance capabilities include greenhouse gas, carbon and energy data, nature-related metrics, diversity and inclusion information, social impact, sustainable finance information, and certain supply-chain claims.
The firm’s sustainability assurance work uses recognised standards including ISAE 3000 and ISAE 3410 where applicable. RSM has a Birmingham office at 103 Colmore Row, making the service accessible to businesses in the city and across the West Midlands.
BDO provides ESG readiness and assurance services designed to help organisations move from internally prepared sustainability information toward independent external assurance. Its work can include assessing the controls and processes behind ESG metrics, pre-assurance readiness reviews, and limited assurance engagements.
The firm references ISAE 3000 and ISAE 3410 within its ESG assurance approach. BDO’s Birmingham office at Two Snowhill serves organisations across Birmingham and the wider West Midlands, giving businesses a local option for combining ESG work with financial audit, risk, accounting, and tax services.
Assurance scope: ESG metrics, greenhouse gas information, reporting processes
Standards: ISAE 3000 and ISAE 3410 where relevant
Location: Two Snowhill, Birmingham
Suitable for: Organisations that need to improve ESG reporting controls before seeking independent assurance
Contact Information
Website: www.bdo.co.uk
Phone: 0121 352 6200
Address: Two Snowhill Birmingham, B4 6GA, United Kingdom
LinkedIn: www.linkedin.com/company/bdo-llp
Instagram: www.instagram.com/bdo_uk
EY UK
EY provides assurance over non-financial and sustainability reporting, including ESG disclosures, data, targets, KPIs, climate information, and carbon-related reporting. Its sustainability assurance work can extend from selected performance indicators to broader reporting and control environments.
EY also describes limited and reasonable assurance approaches under recognised non-financial assurance methodologies. Its current Birmingham office is at One Colmore Square, providing a local base for companies that need sustainability assurance supported by wider audit, climate, reporting, and risk capabilities.
Assurance areas: ESG disclosures, KPIs, targets, climate information, carbon data
Assurance levels: Limited and reasonable assurance depending on engagement scope
Location: One Colmore Square, Birmingham
Suitable for: Large and complex organisations with extensive sustainability reporting requirements
Contact Information
Website: www.ey.com
Phone: +44 121 535 2000
Address: One Colmore Square, Birmingham B4 6HQ
LinkedIn: www.linkedin.com/company/ernstandyoung
Facebook: www.facebook.com/EY
Twitter: x.com/EYnews
Forvis Mazars UK
Forvis Mazars provides independent ESG and sustainability assurance covering sustainability disclosures, ESG KPIs, greenhouse gas information, and other non-financial reporting. Its UK offering includes both limited and reasonable assurance, supported by standards including ISAE (UK) 3000 and ISAE 3410.
The firm also provides readiness services for organisations preparing for mandatory or voluntary sustainability assurance. Its Birmingham office is at Three Chamberlain Square, giving companies in the region local access to assurance, audit, accounting, risk, and sustainability specialists.
MHA provides audit and assurance services alongside ESG and sustainability advisory support. Its ESG Audit & Assurance team can provide independent assurance over selected aspects of an organisation’s sustainability information, including governance, risk, climate-related work, data, and disclosures.
This makes the company relevant where the requirement is focused on particular ESG reporting components rather than necessarily assuring an entire sustainability report from the outset. MHA has a Birmingham office on Newhall Street, providing a local point of contact for businesses across the Midlands.
Choosing between ESG assurance companies in Birmingham depends on the size of the business, its sector, the maturity of its reporting and internal processes, and the regulatory requirements it needs to address. Some companies combine ESG assurance with wider audit, sustainability, risk, and reporting services, while others concentrate on narrower areas such as carbon verification or selected sustainability disclosures. The right partner should provide credible independent assurance while identifying practical steps that can reduce reporting and control risks and strengthen long-term resilience. This guide is intended to provide neutral context for comparing different approaches rather than suggesting a single option for every organisation. The most suitable choice ultimately depends on the scope of assurance required and the type of expertise that fits the organisation’s existing ESG framework.
AC
Written by the Acumon team
Acumon is an ICAEW-registered firm of chartered accountants and registered auditors
based in London, with offices in Pitstone, Aylesbury and Bournemouth. Need advice on
anything covered here? Talk to us.
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