Financial Due Diligence Services in the UK: Firms and Selection Guide
AC
Acumon Chartered Accountants·19 min read
Choosing a financial due diligence provider in the UK isn’t just something that happens right before a deal closes. In many cases, it shapes how confident a business feels about an acquisition, investment, or even an exit. A good review can uncover what’s actually going on behind the numbers, not just what’s presented on the surface.
The UK market is fairly broad here. You’ve got large advisory networks handling complex, cross-border transactions, alongside smaller firms that focus on specific sectors or deal sizes. Each comes with a slightly different way of looking at risk, financial performance, and deal structure.
This guide looks at a selection of financial due diligence services companies operating across the UK. It’s not about ranking them or calling out a “best” option. The idea is simpler - to give a clearer picture of who these firms work with, what kind of transactions they tend to support, and where they fit depending on the situation you’re dealing with.
Acumon
Acumon is a London-founded firm of chartered accountants, auditors and advisors, working with clients across the UK and internationally. Their work covers accounting, audit, tax and advisory, with financial due diligence delivered as part of a broader M&A and risk advisory offering. As a full-service practice, the firm tends to support organisations dealing with more complex financial, governance and regulatory requirements, where transactions need to be understood in a wider business context, not just at a numbers level.
In practice, financial due diligence is closely tied to how businesses assess risk, validate financial performance and approach deal negotiations. Acumon works with finance teams, investors and leadership groups to review financial data, identify inconsistencies and clarify underlying drivers behind reported results. There is a clear link here to governance and regulatory oversight, as reviews often consider how reporting aligns with UK standards and how reliable the underlying processes actually are.
Their due diligence work sits within a wider risk, technology and advisory framework. This means reviews don’t just focus on historic figures, but also on controls, systems and reporting structures that support those figures. It gives a more complete view of financial position, while also helping organisations spot gaps in compliance, strengthen internal processes and move into transactions with a clearer understanding of risk.
Key Highlights:
London-based firm working with UK and international clients
Registered audit practice with regulated oversight
Address: 1-2 Craven Road, Ealing, London, W5 2UA, UK
Moore Kingston Smith
Moore Kingston Smith is a UK-based advisory and accountancy firm providing financial due diligence as part of its wider corporate finance and transaction services offering. Their work tends to focus on mid-market transactions and SMEs, where understanding the practical realities behind financial performance is often just as important as reviewing the numbers themselves. As part of the Moore Global network, they also support deals that involve international elements, particularly where cross-border structures or investors are involved.
Their due diligence approach is built around the full transaction lifecycle, from early-stage negotiations through to completion. They work with buyers, sellers and investors to assess risks, test assumptions and translate findings into clear, usable insights. There is a noticeable focus on keeping things practical - not just identifying issues, but helping clients understand what those issues mean in terms of valuation, deal structure and next steps.
Key Highlights:
UK advisory firm with access to global corporate finance network
Strong focus on mid-market transactions and SME deal environments
Supports buyers, sellers and investors across different transaction types
Works across sectors including technology, education and business services
Covers full transaction lifecycle from early review to completion
Due diligence integrated within broader corporate finance advisory work
Armstrong Watson is a UK advisory and accountancy firm delivering financial due diligence within its corporate finance services. Their work is closely tied to mid-market and owner-managed businesses, often supporting transactions where financial clarity and realistic assumptions play a central role in decision-making. Due diligence here is used as a way to validate performance, rather than just confirm reported figures.
Their reviews focus on key financial drivers such as earnings quality, working capital and balance sheet position. The aim is to give buyers and investors a clearer view of what sits behind valuation expectations and where risks might emerge after the deal. Findings are typically presented in a structured report, highlighting areas that may affect pricing, require negotiation or need attention post-transaction, including aspects of reporting, controls and compliance.
Key Highlights:
UK advisory firm focused on mid-market and owner-managed businesses
Supports investors, buyers and funders in transaction decision processes
Focus on earnings quality and sustainable profitability assessment
Reviews working capital dynamics and balance sheet positions in detail
Produces structured reports with clear findings and practical implications
Links due diligence findings to valuation and negotiation considerations
Services:
Financial due diligence
Earnings analysis
Working capital review
Balance sheet review
Due diligence reporting
Contact information:
Website: www.armstrongwatson.co.uk
Phone: 0161 2590260
Address: Suite 62, Pure Offices, Brooks Drive, Cheadle Royal Business Park, Manchester, SK8 3TD
Kreston Reeves is a UK accountancy and advisory firm providing financial due diligence through its corporate finance team. Their work supports buyers, sellers, investors and funders, with reviews designed to give a clearer understanding of financial performance and transaction risks. They also draw on a wider international network when deals involve overseas entities or cross-border considerations.
Their due diligence approach is flexible depending on the scope of the transaction, ranging from high-level reviews to more detailed analysis. The focus is on identifying risks early, assessing financial assumptions and providing clear outputs that can be used in negotiations and decision-making. There is also a connection to tax and wider advisory teams, which allows financial findings to be considered alongside tax exposure and structural factors.
Key Highlights:
UK accountancy firm with access to international Kreston Global network
Supports buyers, sellers, investors and funders across transaction stages
Flexible scope from high-level reviews to detailed financial analysis
Focus on early identification of risks and financial performance issues
Integration with tax teams for broader transaction and structuring insights
Experience supporting cross-border deals with international considerations
Services:
Financial due diligence
Vendor due diligence
Pre-acquisition review
Pre-investment review
Pre-lend review
Tax due diligence
Contact information:
Website: www.krestonreeves.com
Phone: +44 (0)330 124 1399
Address: 2nd Floor, 168 Shoreditch High Street, London, E1 6RA
Twitter: x.com/KrestonReeves
LinkedIn: www.linkedin.com/company/kreston-reeves
Saffery
Saffery is a UK advisory and accountancy firm providing financial due diligence as part of its transaction services offering. Their work supports clients through different stages of a deal, from initial assessment through to completion, with a focus on understanding financial performance, risk areas and underlying assumptions. Reviews typically look at earnings quality, working capital and debt positions, helping clients build a clearer view of how a business operates financially.
Alongside the core financial review, their approach also connects due diligence with broader considerations such as compliance with UK accounting standards and emerging areas like ESG reporting. This means the work often goes beyond headline figures, looking at how financial information is prepared, how risks are managed and whether reporting aligns with regulatory expectations. The outcome is usually a more grounded view of both short term transaction risks and longer term resilience.
Key Highlights:
UK advisory firm supporting transactions across different stages of deal process
Financial due diligence focused on earnings quality and working capital analysis
Reviews include debt positions and underlying financial performance drivers
Work considers compliance with UK GAAP and IFRS reporting standards
Experience supporting transactions across a range of sectors and deal types
ESG and sustainability factors included within broader due diligence reviews
Address: Trinity Court, 16 John Dalton Street, Manchester, M2 6HY
LinkedIn: www.linkedin.com/company/saffery
Instagram: www.instagram.com/saffery_uk
Mercer & Hole
Mercer & Hole is a UK accountancy and advisory firm providing financial due diligence within its corporate finance services. Their work supports buyers, sellers and investors across a range of transactions, including acquisitions, disposals and management buyouts. Reviews are typically shaped around the specific requirements of each deal, rather than following a fixed template.
Their due diligence focuses on identifying financial risks, testing assumptions and supporting negotiations, particularly around the sale and purchase agreement. They also work with lenders and financial institutions, carrying out pre-lending and independent business reviews. There is a clear link between due diligence findings and how deals are structured, with attention given to areas that may affect value, risk allocation and post-transaction outcomes.
Key Highlights:
UK firm supporting buyers, sellers and investors across transaction processes
Experience with private equity, entrepreneurs and management buyout teams
Flexible scope tailored to specific transaction requirements and deal context
Involvement in SPA review and negotiation support during transactions
Works with lenders on pre-lending and independent business reviews
Sector experience across technology, manufacturing and professional services
S&W is a UK advisory firm providing financial due diligence as part of its corporate finance and transaction services. Their work is built around helping clients understand both historic performance and forward looking assumptions before entering or progressing through a deal. Reviews often include analysis of earnings, cash flows, working capital and key financial drivers that influence valuation and deal structure.
Their approach tends to be flexible and shaped around the priorities of each transaction. Alongside financial analysis, they also look at areas such as tax exposure, internal controls and completion mechanisms, helping clients identify risks early and understand how those risks may affect negotiations. The work often extends into SPA advisory and vendor support, linking financial findings directly to deal execution.
Key Highlights:
UK advisory firm focused on financial due diligence in transaction settings
Reviews cover historical performance and forward looking financial assumptions
Analysis includes cash flow, working capital and key value drivers
Flexible scope tailored to transaction priorities and client requirements
Links due diligence findings to SPA advisory and deal negotiations
Experience supporting buy-side, vendor and financing related transactions
Services:
Financial due diligence
Vendor due diligence
Tax due diligence
SPA advisory
Completion accounts
Vendor assistance
Contact information:
Website: www.swgroup.com
Phone: +44 117 233 2200
Address: EQ Building, 111 Victoria Street, Bristol BS1 6AX
Twitter: x.com/S_W_Group
LinkedIn: www.linkedin.com/company/swgroupuk
Zenith Advisory
Zenith Advisory is a UK advisory firm providing financial due diligence focused on assessing the financial health and risks of potential transactions. Their work typically centres on reviewing financial statements, profitability and cash flow, with the aim of understanding how stable and reliable the underlying business performance actually is. The process also includes identifying risks that may not be immediately visible, such as undisclosed liabilities or inconsistencies in reported figures.
Their approach links financial analysis with transaction decision-making. Alongside reviewing earnings and working capital, they also look at tax exposure and compliance, helping clients understand how these factors may affect deal value or structure. The output is usually tied back to practical recommendations, particularly around pricing, deal terms and how risks can be managed before moving forward.
Key Highlights:
UK advisory firm focused on financial due diligence for transactions
Reviews cover financial health, profitability and overall business stability
Focus on identifying hidden risks and undisclosed financial liabilities
Includes earnings quality and sustainability of financial performance analysis
Assesses working capital, cash flow and liquidity position of business
Links findings to deal structure and transaction decision considerations
Vision Consulting is a UK-based advisory firm providing financial due diligence across a range of industries, including real estate, financial services and asset management. Their work focuses on analysing financial statements, cash flow models and revenue projections to understand how a business performs and whether those figures are sustainable over time. Reviews are typically tailored depending on the size and nature of the transaction.
Their due diligence process is built around detailed financial examination and risk assessment. They look at how reliable financial projections are, where risks may sit within the business and how those risks could affect future performance. In addition to identifying issues, their work often includes practical recommendations around financial management, cost structure and operational improvements that may become relevant after a transaction.
Key Highlights:
UK advisory firm working across multiple industries and transaction types
Financial analysis includes statements, projections and cash flow models
Focus on sustainability of revenues and reliability of financial forecasts
Risk assessment linked to mergers, acquisitions and investment decisions
Tailored approach depending on transaction scale and business complexity
Provides recommendations on financial management and cost structure
Consilium Chartered Accountants is a UK firm providing financial due diligence as part of its corporate finance and transaction support work. Their approach centres on building a detailed understanding of a target business, not just through historic accounts but also by reviewing how the business actually operates. This includes looking at earnings quality, cash generation, working capital and the reliability of financial reporting processes, which can often shape how much confidence a buyer or investor places in the numbers.
Their work is closely tied to transaction context, whether that’s pre-acquisition, pre-investment or pre-lending. Reviews are typically tailored to the specific concerns of each deal, with attention given to projections, liabilities and the finance function itself. There is also a clear link to deal structure, as findings often feed into valuation, risk assessment and negotiations around pricing or protections.
Key Highlights:
UK advisory firm supporting buyers, investors and lenders in transactions
Focus on earnings quality and sustainability of financial performance
Reviews include cash generation and working capital requirements analysis
Assesses financial reporting processes and reliability of finance function
Tailored scope depending on transaction type and specific client concerns
Links due diligence findings to valuation, pricing and deal negotiations
Insights UK is a UK-based advisory firm providing due diligence services that combine financial, operational and regulatory review. Their financial due diligence work focuses on analysing financial statements, profitability trends and cash flow to build a clear view of a target company’s position. Alongside this, they also assess debt structures, working capital and tax matters, helping identify areas that may affect transaction value or risk.
Their approach is broader than a purely financial review, often linking financial findings with operational and market context. This includes looking at how a business is positioned within its industry, how sustainable its revenue streams are and whether there are any compliance or structural risks that could affect future performance. The result is a more complete picture that supports decision-making across acquisitions, investments and joint ventures.
Key Highlights:
UK advisory firm combining financial, operational and regulatory due diligence
Reviews include financial performance, profitability trends and cash flow analysis
Assesses working capital, debt structures and taxation related exposures
Links financial findings with market position and industry context
Covers legal and compliance risks alongside financial due diligence work
Supports acquisitions, investments and joint venture transaction decisions
Wilson Partners is a UK advisory and accountancy firm providing financial due diligence primarily within investment and private equity contexts. Their work focuses on delivering independent assessments of businesses, helping investors understand financial performance, risks and potential issues before completing a transaction. The emphasis is on gaining a full picture of the business rather than treating due diligence as a standard process step.
Their reviews are typically led by senior team members and are closely tied to transaction outcomes. They look at both risks and opportunities, helping investors understand how findings may affect value and deal structure. Due diligence is also linked to broader corporate finance services, including tax structuring and valuations, which allows financial insights to be considered alongside wider transaction planning.
Key Highlights:
UK advisory firm supporting private equity and investment transactions
Focus on independent financial assessment of target businesses
Senior-led due diligence with direct involvement in transaction process
Reviews identify risks, opportunities and valuation related considerations
Links due diligence findings to tax structuring and deal planning
Experience supporting investment decisions across different sectors
PEM Corporate Finance is a UK advisory firm providing financial due diligence as part of its transaction support services. Their work focuses on helping clients understand the financial reality behind a business before committing to a deal. Reviews typically go beyond headline figures, looking at earnings quality, cash generation, working capital and the structure of liabilities, as well as how reliable the underlying reporting processes are.
Their approach is closely tied to transaction outcomes. Senior team members are involved throughout the process, with findings delivered in a way that connects directly to pricing, deal terms and negotiation points. The work is usually shaped around the specific deal, whether that involves an acquisition, disposal or investment, with attention given to how risks and assumptions may affect the overall structure of the transaction.
Key Highlights:
UK corporate finance firm focused on financial due diligence in transactions
Senior-led reviews with direct involvement throughout the due diligence process
Focus on earnings quality and sustainability of financial performance
Reviews include working capital, cash flow and debt structure analysis
Assesses reliability of financial reporting and finance function processes
Links due diligence findings to pricing, deal terms and negotiations
HURST is a UK accountancy and advisory firm providing financial due diligence to support acquisitions, investments and strategic decisions. Their work focuses on reviewing financial performance, identifying risks and verifying whether financial information reflects the true position of the business. This typically includes analysis of cash flow, working capital and profitability, alongside a closer look at how reliable the underlying data is.
Their due diligence is tailored to the transaction, with findings used to support negotiations and decision-making. Reviews often consider both historic performance and forward looking projections, helping clients understand how sustainable the business is over time. There is also a clear connection to broader advisory work, where financial findings feed into valuation discussions and post-transaction planning.
Key Highlights:
UK advisory firm supporting acquisitions, investments and transaction decisions
Reviews focus on financial performance, risks and data reliability
Analysis includes cash flow, working capital and profitability trends
Assesses forecasts and sustainability of future financial performance
Tailored approach depending on transaction scope and business context
Links findings to valuation, negotiation and post-deal planning
Forrester Boyd is a UK accountancy firm providing due diligence services as part of its broader advisory offering. Their work focuses on reviewing both financial and operational aspects of a business, helping clients understand what they are taking on before completing a transaction. This includes analysing financial performance, identifying liabilities and assessing whether the business is being accurately represented.
Their approach is centred on risk identification and compliance. Reviews often look at financial health, tax obligations and adherence to reporting standards, ensuring there are no gaps that could affect the outcome of a deal. The aim is to provide a clearer picture of the business, allowing clients to make more informed decisions and address potential issues before moving forward.
Key Highlights:
UK accountancy firm providing financial and operational due diligence services
Reviews cover financial performance, liabilities and overall business position
Focus on identifying risks and potential issues before transaction completion
Includes tax compliance and financial reporting standards assessment
Supports acquisitions, investments and other business transaction decisions
Links due diligence findings to risk management and deal preparation
The MGroup Partnership is a UK advisory firm providing financial due diligence to support transactions such as acquisitions, investments and partnerships. Their work focuses on building a clear view of a company’s financial position by reviewing historical performance, current financial standing and future projections. This usually includes analysis of financial statements, cash flow and balance sheet structure, alongside identifying risks that may affect the outcome of a deal.
Their approach links financial analysis with how a transaction is structured and managed. Reviews often cover areas such as earnings quality, working capital and tax exposure, helping clients understand how these factors influence valuation and negotiation. There is also attention given to operational and market risks, which can affect long term performance beyond the initial transaction, especially where integration or financing is involved.
Key Highlights:
UK advisory firm supporting acquisitions, investments and partnership transactions
Reviews include historical performance, current position and future projections
Focus on earnings quality and sustainability of reported financial performance
Analysis covers cash flow, working capital and balance sheet structure
Includes tax exposure and financial obligations within due diligence scope
Considers operational and market risks alongside financial analysis
Choosing a financial due diligence provider in the UK rarely comes down to a simple comparison. Most organisations don’t start with a shortlist of firms - they start with a situation. It might be an acquisition that needs validating, an investment that feels promising but uncertain, or a sale where they want to understand how their business will be viewed from the outside. The choice of provider usually follows from that context.
Some teams look for firms that can handle complex, cross-border transactions. Others prefer smaller advisory groups that stay close to the detail and move a bit faster. In practice, it often comes down to how well a firm understands the type of deal, the sector, and the specific risks involved. Financial due diligence is not just about checking numbers - it is about interpreting them in a way that actually supports a decision.
That is really where this guide fits in. Instead of ranking companies or pointing to a single “right” option, it lays out how different firms approach due diligence, what kind of work they tend to focus on, and where they might be a better fit depending on the situation. It helps narrow things down, or at least gives a clearer starting point.
In the end, most organisations are not looking for perfection - they are looking for clarity. And having a better sense of who does what, and how they approach it, makes that process a bit more manageable.
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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