Choosing the right company for your statutory audit can feel overwhelming, especially in a market as large and varied as London. This guide is designed as a practical overview to help you navigate the landscape of statutory audit services companies operating in the capital. It is not a ranking or a “top list”, but a clear and balanced review that highlights how these companies work and what sets them apart. You’ll find everything from large, full-service audit companies to more specialist practices, each with different strengths, client focuses, and ways of working. Some primarily serve growing SMEs, while others focus on larger groups, charities, or international subsidiaries. By the end of this article, you’ll have a much better understanding of who these companies are, the types of businesses they support best, and the key factors worth considering when making your decision.
Acumon
Acumon is a UK company of chartered accountants and registered auditors providing statutory audit services to companies, charities, and international corporate groups.
The company works with organisations ranging from growing owner-managed businesses to larger corporate groups and regulated entities. Audit engagements follow International Standards on Auditing (UK) and are delivered using a structured risk-based approach.
Acumon holds a Public Interest Entity (PIE) audit licence, allowing it to audit listed companies and other entities subject to enhanced regulatory oversight. The company also holds audit licences for Jersey and the Isle of Man, enabling support for international group structures across multiple jurisdictions. Acumon works closely with finance teams and boards to deliver statutory audit requirements while helping organisations improve their financial reporting processes and governance as they grow.
Audit Capabilities:
Acumon provides external audit services across a wide range of organisational structures and sectors.
These include:
- UK limited companies and corporate groups
- Public Interest Entities (PIEs)
- UK subsidiaries of international groups
- Charities and not-for-profit organisations
- Owner-managed businesses
- Jersey and Isle of Man entities
Regulatory Licences and Registrations:
Acumon holds several audit registrations that support organisations operating across jurisdictions.
These include:
- UK statutory audit registration with ICAEW
- Public Interest Entity (PIE) audit licence
- Jersey Recognised Auditor status
- Isle of Man Recognised Auditor status
Core Services:
These include:
- Statutory audit services
- Group and subsidiary audits
- Public Interest Entity (PIE) audits
- Charity audit
- International group audits
- Jersey and Isle of Man entity audits
Supporting Growing Organisations:
Many organisations first face statutory audit requirements as they grow and exceed the audit exemption thresholds.
Acumon supports businesses that are:
- Approaching their first statutory audit
- Preparing for external investment
- Expanding into international markets
- Operating within group structures
Early engagement helps align financial reporting systems with statutory requirements.
Contact Information:
- Website: acumon.com
- Phone: 020 8567 3451
- Email: [email protected]
- Address: 1-2 Craven Road, Ealing, London, W5 2UA, UK
BDO LLP
BDO provides statutory audit services to a wide variety of companies operating across the UK. From its offices in London and other major cities, the company delivers independent audits that meet current regulatory requirements while taking into account the specific nature of each business and its industry.
The audit teams combine deep technical knowledge with practical experience. They work closely with clients throughout the process, using modern tools and data analytics to make the audit more efficient. This approach helps companies receive clear and timely feedback on their financial reporting and internal controls.
Key Highlights:
- Independent audit delivery
- Industry-specific knowledge
- Use of data analytics
- Clear and timely communication
- Regulatory compliance focus
Services:
- Statutory audit
- Financial statement audit
- IFRS reporting support
- UK GAAP audits
- Risk-based audit approach
- Governance and compliance review
Grant Thornton
Grant Thornton offers statutory audit services to private companies, listed entities and not-for-profit organisations throughout London and the UK. The company is known for adapting its audit approach to match the size, complexity and sector of each client.
Their teams bring sector experience and apply technology to improve the quality and efficiency of the audit. Regular dialogue and a responsive style help reduce disruption to daily operations while maintaining high professional standards. Clients often appreciate the balance between technical rigour and practical business understanding.
Key Highlights:
- Flexible audit approach
- Sector and size adaptation
- Technology-enhanced processes
- Responsive client communication
- Practical business insight
Services:
- Statutory audit
- Audit for listed companies
- Audit for private businesses
- Not-for-profit audit
- Financial services audit
- International group audit
RSM
RSM specialises in statutory audit services for mid-market companies based in London and across the UK. The company focuses on delivering audits that are both technically sound and aligned with the commercial realities of growing businesses.
The audit process is built around detailed understanding of the client’s operations and risks. Teams maintain consistent contact and provide clear updates at every stage. This structured yet practical method helps companies meet their regulatory obligations without unnecessary complexity.
Key Highlights:
- Mid-market specialist focus
- Commercial awareness in audit
- Detailed risk understanding
- Consistent client contact
- Structured audit delivery
Services:
- Statutory audit
- Audit for growing companies
- Risk assessment procedures
- Financial reporting review
- Compliance audit
- Mid-market business audit
PKF Littlejohn
PKF Littlejohn conducts statutory audit services from its central London office for companies of different sizes and ownership structures. The company supports listed entities, private businesses, owner-managed companies and those backed by private equity.
Their audit approach starts with early insight into the client’s key areas and uses data analytics to focus on material risks. Regular and proactive communication keeps the engagement smooth and on schedule. The team aims to deliver audits that are thorough, transparent and valuable for decision-making.
Key Highlights:
- London office delivery
- Experience with varied ownership structures
- Early risk identification
- Data analytics in audit
- Proactive communication
Services:
- Statutory audit
- Audit for listed entities
- Audit for private companies
- Owner-managed business audit
- Private equity backed audit
- Group and subsidiary audit
PwC
PwC delivers statutory audit services to large and complex organisations across London and the UK. The company supports companies with significant reporting requirements, including those listed on the stock exchange and entities with international operations.
Audit teams combine technical expertise with an understanding of industry-specific issues. They apply structured methodologies and modern tools to examine financial statements and controls. Communication stays clear and consistent throughout the engagement, helping clients meet regulatory expectations while keeping the process manageable.
Key Highlights:
- Focus on large and listed companies
- Structured audit methodology
- Industry issue understanding
- Consistent client communication
- Regulatory expectation support
Services:
- Statutory audit
- Financial statement assurance
- Listed company audit
- International group audit
- Risk assessment in audit
- IT systems review during audit
Deloitte
Deloitte provides statutory audit services with an emphasis on building trust in financial reporting. The company works with organisations that operate in regulated environments and capital markets across the UK.
The audit approach integrates advanced technology and data analytics to examine financial information more effectively. Multidisciplinary teams bring different perspectives to the process. This helps identify relevant risks and supports the delivery of independent assurance that meets current standards and stakeholder needs.
Key Highlights:
- Technology and data analytics integration
- Multidisciplinary team approach
- Focus on audit quality
- Independent assurance delivery
- Risk identification process
Services:
- Statutory audit
- Financial reporting assurance
- Review of IT controls as part of statutory audit
- Data analytics in audit
- Regulatory audit requirements
EY
EY offers statutory audit and assurance services to companies in London and throughout the UK. The company supports organisations with diverse reporting needs, from listed entities to those with more complex structures.
Their process pays close attention to regulatory developments and applies consistent standards across engagements. Teams focus on understanding the business context behind the numbers. Regular updates and clear reporting help clients stay informed during the audit cycle.
Key Highlights:
- Regulatory development focus
- Business context understanding
- Consistent audit standards
- Clear reporting process
- Engagement cycle support
Services:
- Statutory audit
- Assurance services
- Financial information review
- Listed entity audit
- Regulatory compliance audit
- Complex structure audit
KPMG
KPMG carries out statutory audit services aimed at providing independent assurance over financial reporting. The company works with organisations that need to demonstrate credibility to investors and other stakeholders in the UK market.
The audit process makes use of data and analytics tools to concentrate on areas of higher importance. Professional scepticism and a quality-focused culture guide the work at every stage. KPMG also considers broader factors such as governance and emerging reporting expectations during the engagement.
Key Highlights:
- Independent financial reporting assurance
- Data and analytics application
- Quality-focused culture
- Professional scepticism approach
- Governance consideration in audit
Services:
- Statutory audit
- Assurance over financial information
- ESG-related audit elements
- Data-driven audit procedures
Moore Kingston Smith
Moore Kingston Smith delivers statutory audit services to a range of companies in London and beyond. The company supports family owned businesses, privately held companies, listed entities and those backed by private equity.
Audit teams combine traditional skills with the use of data analytics and technology to examine financial information. They take time to understand each client’s priorities and the regulatory environment that applies. This helps shape an audit process that fits the specific reporting needs, whether under UK GAAP, IFRS or other frameworks.
Key Highlights:
- Work with private and listed companies
- Use of data analytics
- Understanding of client priorities
- Tailored audit process
- Expertise in different reporting standards
Services:
- Statutory audit
- Financial reporting
- Listed company audit
- Private equity backed audit
- Nonprofit reporting
Warrener Stewart
Warrener Stewart carries out statutory audit services for companies of varying sizes and complexity. The company works with limited companies, LLPs, multi-site organisations, UK subsidiaries of European groups, regulated businesses and charities.
The audit process starts with detailed planning and continues with close collaboration between the audit team and the client’s finance staff. Experienced directors stay involved from start to finish. This structured yet flexible method aims to deliver reliable financial reporting while offering practical observations on systems and risks where relevant.
Key Highlights:
- Tailored audit for different business types
- Close client collaboration
- Experienced audit directors
- Focus on reliable reporting
- Support for multi-site and subsidiary structures
Services:
- Statutory audit
- Audit for limited liability partnerships
- Audit for charities
- Audit for regulated businesses
- Audit for UK subsidiaries
- Financial reporting insights
Hartley Fowler
Hartley Fowler offers statutory audit services conducted in accordance with clarified International Auditing Standards. The company supports private limited companies in the UK that meet the statutory audit threshold.
The process is designed to keep disruption to a minimum while maintaining quality and efficiency. Teams review internal control systems, document findings and provide recommendations in a management letter at the end of the engagement. Clear deadlines are agreed early so that financial reporting stays on schedule, even when tight timeframes apply.
Key Highlights:
- Compliance with international auditing standards
- Minimal disruption approach
- Review of internal controls
- Timely financial reporting
- Management letter recommendations
Services:
- Statutory audit
- Internal control review
- Financial statement assessment
- Audit for private limited companies
- Assurance under UK and Ireland standards
Walden Way & Co
Walden Way & Co delivers statutory audit services in London to businesses of different sizes. The company supports both smaller operations and larger organisations across various sectors, including health, contracting and dental practices.
The audit process begins with planning and risk assessment, followed by detailed fieldwork to gather evidence and test controls. Teams review financial statements for compliance with applicable standards and issue a report with findings. This structured method helps companies meet regulatory obligations while maintaining transparency in their financial reporting.
Key Highlights:
- London-based audit delivery
- Support for different business sizes
- Sector-specific understanding
- Risk assessment focus
- Clear reporting process
Services:
- Financial statement review
- Internal control assessment
- Regulatory compliance review
- Statutory audit
- External audit assurance
Kreston Reeves
Kreston Reeves provides statutory audit and assurance services from offices in London and the South East. The company works with limited companies, LLPs, academy schools, listed entities, charities and not-for-profit organisations.
Their approach involves independent examination of financial statements under UK and international standards. Teams handle complex structures and group engagements where logistical planning is required. Regular communication helps keep clients informed during the audit cycle while addressing specific regulatory demands.
Key Highlights:
- Coverage across London and South East
- Work with varied organisation types
- Handling of complex structures
- Group engagement capability
- Stakeholder confidence support
Services:
- Group audit engagements
- Listed entity audit
- Statutory audit
- Assurance services
- Risk assurance
Arnold Hill & Co
Arnold Hill & Co offers statutory and regulatory audit services in London. The company supports public and private limited companies, including those in financial services, property, charities and pension schemes.
Audits follow FRC regulations and are tailored to each business’s financial and operational circumstances. The process includes validation of accounts, review of legal compliance and identification of any material issues. This customer-centred method delivers an objective overview while identifying areas for potential improvement.
Key Highlights:
- Tailored audit procedures
- Regulatory compliance focus
- Hands-on client approach
- Account validation process
- London-based delivery
Services:
- Regulatory audit
- Statutory audit
- Financial accounts review
- Compliance assessment
Rayner Essex
Rayner Essex carries out audit services in London and Hertfordshire for businesses across many industries. The company supports public companies and other entities where statutory audit is required by law.
The process is partner-led with a dedicated team and consistent point of contact. Teams use agile working methods that allow flexibility between on-site and remote delivery. This relationship-driven style includes risk assessment and practical insights into financial systems and controls.
Key Highlights:
- Partner-led audit process
- Dedicated client contact
- Agile working practices
- Risk assessment in audit
- Coverage in London and Hertfordshire
Services:
- Component audit
- Group audit
- Statutory audit
- Financial statement review
- Regulatory reporting support
Conclusion
Choosing the right company for statutory audit services in London depends on several practical factors. These include the size and complexity of your business, the sector you operate in, the maturity of your internal processes, and the specific regulatory requirements you need to meet.
Some companies take a broad, integrated approach that suits larger or more complex organisations. Others focus on a more specialised or hands-on service that can work better for certain types of businesses. There is no single solution that fits every situation.
This guide has aimed to provide clear, neutral context about how different statutory audit services companies in London operate. The right partner delivers independent assurance and practical steps to reduce risks and support resilience. Ultimately, the decision comes down to finding the company whose approach, communication style and understanding of your needs align with what your business requires.