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Tesco's £3.7 Billion Acquisition of Booker: A Commercial Due Diligence Case Study

2 September 2026 · 14 min read · Platform01 Consulting Global

In 2017, Tesco announced its proposed acquisition of Booker Group in a deal valued at approximately £3.7 billion. The transaction brought together one of the UK’s largest supermarket groups and the country’s largest food and drink wholesaler, creating a business with a significantly broader presence across retail, wholesale, convenience and foodservice.

At first glance, the strategic rationale was compelling.

Tesco had significant scale in grocery retail, while Booker had an extensive network serving independent retailers, convenience stores, caterers and other businesses. Combining the two could potentially create purchasing efficiencies, supply-chain benefits, access to new customers and opportunities to strengthen their respective market positions.

But strategic logic alone does not make an acquisition attractive.

For an investor or corporate acquirer, the fundamental questions are much broader:

Is the market attractive? Is the target’s competitive position sustainable? Are customers likely to remain loyal? Are projected growth assumptions realistic? And can the anticipated synergies actually be delivered?

These are precisely the questions addressed through commercial due diligence.

The Tesco–Booker transaction therefore provides a useful case study in understanding how commercial due diligence can help buyers evaluate the underlying commercial rationale of a major acquisition.

The Tesco–Booker Deal

Tesco agreed to acquire Booker Group in a transaction valued at approximately £3.7 billion, subject to shareholder and regulatory approval.

Booker was a major player in the UK’s wholesale market, operating through brands and businesses including Booker Wholesale, Makro and Premier. Its customer base included independent retailers, convenience stores, caterers, restaurants and other businesses.

Tesco, meanwhile, had an extensive network of supermarkets, convenience stores and other retail operations.

The proposed combination was therefore not simply a case of one grocery company buying another. It connected two businesses operating at different stages of the food supply chain.

That distinction was central to the investment rationale.

Tesco could potentially leverage Booker’s wholesale infrastructure and relationships with independent retailers, while Booker could benefit from Tesco’s scale, purchasing capabilities and broader resources.

The strategic thesis was based on the idea that the combined business could create more value than either company could independently. But that thesis needed to be tested.

Why Was Booker Attractive to Tesco?

A commercial assessment of the acquisition would begin by understanding why Booker represented an attractive target. Several factors stood out.

1. A strong position in UK food wholesale

Booker had developed a substantial position in the UK’s wholesale and convenience market.

Its customer base gave it exposure to thousands of independent retailers and other businesses that were not necessarily served through traditional supermarket channels. This provided Tesco with access to a different customer ecosystem.

2. Exposure to the growing convenience segment

Consumer shopping behaviour has increasingly favoured convenience.

Smaller-format stores and local shopping locations can benefit from consumers making more frequent, smaller purchases rather than relying exclusively on large weekly supermarket trips. Booker’s relationships with independent retailers gave Tesco potential exposure to this part of the market.

3. Scale and purchasing power

Tesco already had significant purchasing scale.

Combining this with Booker’s wholesale operations created the possibility of further procurement and supply-chain efficiencies. However, the existence of scale does not automatically mean that all potential savings will materialise. This is where commercial diligence becomes important.

4. A complementary customer base

Tesco primarily served consumers through its retail network. Booker served businesses.

The different customer bases created potential opportunities for cross-selling, distribution efficiencies and broader market coverage.

What Would Commercial Due Diligence Have Examined?

Before completing a transaction of this scale, a buyer would typically conduct extensive commercial analysis.

While financial due diligence focuses heavily on the accuracy and sustainability of financial information, commercial due diligence consulting takes a different perspective. It asks what is happening in the market, why customers behave the way they do, how the target competes and whether the company’s future growth assumptions are realistic.

For a transaction such as Tesco–Booker, several areas would have been particularly important.

1. Market attractiveness

The first question for any buyer should be: is the market worth investing in?

A company can be well managed and financially profitable while operating in a market with limited long-term growth. Commercial due diligence therefore examines the broader market before focusing solely on the target.

For Booker, this could involve analysing:

• UK food and grocery market growth
• Wholesale market growth
• Convenience retail trends
• Foodservice demand
• Independent retailer trends
• Consumer purchasing behaviour
• Inflationary pressures
• Supplier dynamics
• Expected future market growth

Historical growth would only tell part of the story. A buyer would also need to understand whether the structural trends supporting the market were likely to continue.

2. Competitive landscape

A target’s market share is useful, but market share alone does not tell an investor whether the business has a sustainable competitive advantage.

A detailed commercial due diligence assessment would examine Booker’s competitive position against other wholesalers, retailers and alternative supply channels. Questions could include:

• Who are the major competitors?
• How concentrated is the market?
• What differentiates Booker?
• How price-sensitive are customers?
• How easy is it for customers to switch suppliers?
• Does Booker have advantages in distribution or purchasing?
• How defensible are its customer relationships?
• What competitive threats could emerge?

The objective is to determine whether the target’s market position is durable. A business with a strong market position today may face very different competitive conditions five years from now.

3. Customer analysis

Revenue quality is ultimately connected to customers. For Booker, customer analysis would therefore be a critical component of the investment assessment.

A buyer could examine:

• Customer concentration — does a significant proportion of revenue come from a relatively small number of customers?
• Customer retention — are customers staying with the business over time?
• Customer acquisition — how efficiently is the company adding new customers?
• Customer spend — how much does the average customer purchase, and how has that changed?
• Customer segmentation — which customer groups generate the highest value?
• Switching behaviour — how easy would it be for customers to move to another supplier?

These questions help determine whether the target’s revenue base is sustainable.

4. Growth opportunities

An acquisition is rarely justified purely by historical performance. Buyers typically pay for future potential. That means commercial diligence needs to identify where future growth is actually expected to come from.

For Tesco and Booker, potential growth opportunities could include:

• Expansion of convenience retail
• Growth in foodservice
• Increased penetration of independent retailers
• Broader product ranges
• Improved distribution
• Cross-selling between customer bases
• Digital ordering and fulfilment
• Geographic expansion

Each opportunity needs to be tested. For example, if management forecasts significant growth in a particular customer segment, a diligence team would want to understand whether the underlying market is large enough and whether the company has the capabilities required to capture that growth — questions often stress-tested through financial modelling.

5. Synergy assessment

Synergies are often one of the most important components of an acquisition thesis. They are also one of the areas where assumptions can become overly optimistic.

In the Tesco–Booker transaction, potential synergies could arise through areas such as:

• Procurement — the combined scale of the businesses could potentially improve purchasing economics
• Supply chain — combining distribution capabilities could create opportunities for operational efficiencies
• Customer relationships — the businesses could potentially leverage their respective customer networks
• Product availability — the combination could improve access to products across different channels
• Operational efficiencies — duplicated activities could potentially be reduced following integration

But a commercial diligence team would need to distinguish between potential synergy and achievable synergy. That distinction is crucial.

A theoretical £100 million opportunity is meaningless if the business lacks the operational capacity, customer access or organisational structure to realise it.

The Importance of Competition and Regulation

Major acquisitions cannot be evaluated solely from the perspective of the buyer and target. The broader competitive environment also matters.

The Tesco–Booker transaction was reviewed by the UK’s Competition and Markets Authority (CMA) as part of the regulatory process.

This illustrates an important consideration for buyers undertaking due diligence in London and across the UK: a transaction can make strategic and financial sense while still facing regulatory or competition-related challenges.

Commercial analysis should therefore consider:

• Market concentration
• Competitor strength
• Customer alternatives
• Supplier dynamics
• Potential barriers to entry
• Regulatory considerations
• Changes in the competitive landscape

For larger transactions, these factors can materially influence the feasibility of the investment thesis.

What Does the Tesco–Booker Deal Teach Investors?

The transaction provides several broader lessons for M&A investors and corporate acquirers.

Strategic fit must be measurable

It is easy to describe two businesses as “complementary.”

The harder task is demonstrating exactly how that complementarity creates value. A good commercial diligence process converts strategic claims into measurable assumptions.

Market growth should not be taken for granted

Historical market growth does not guarantee future performance. Investors need to distinguish between temporary growth and structural growth.

Customer relationships matter as much as financial performance

A company can have attractive historical revenue and EBITDA figures while still facing significant customer-related risks. Understanding customer behaviour is therefore fundamental to assessing the sustainability of the business — and to any credible business valuation.

Synergies should be independently tested

Management teams naturally have an incentive to present the strategic rationale for a transaction positively. Independent commercial analysis can challenge those assumptions.

The objective isn’t to prove the deal is good or bad. It is to determine what would need to be true for the deal to create value.

Commercial Due Diligence vs Financial Due Diligence

The Tesco–Booker transaction also highlights why commercial and financial diligence should be considered complementary rather than interchangeable.

Financial due diligence may examine:

• Historical financial performance
• Quality of earnings
• Working capital
• Cash flows
• Debt
• Revenue recognition
• Financial projections

Commercial due diligence, meanwhile, may focus on:

• Market attractiveness
• Competitive positioning
• Customer behaviour
• Market share
• Revenue drivers
• Growth opportunities
• Pricing
• Industry trends
• Commercial risks
• Synergy potential

The two perspectives ultimately answer different questions.

Financial diligence asks: “Are the financial numbers reliable?” Commercial diligence asks: “What is driving those numbers, and are those drivers sustainable?”

For a major acquisition, both perspectives can be critical.

Where Platform01’s Commercial Due Diligence Services Come In

For investors evaluating an acquisition, one of the biggest challenges is turning fragmented market, customer and competitor information into a clear investment conclusion.

This is where Platform01’s commercial due diligence services can support the transaction process.

Platform01 works with businesses, investors and management teams to assess the commercial fundamentals underlying an investment opportunity. Rather than relying solely on historical financial performance, our approach considers the wider market and the factors that could influence future value creation.

Our commercial due diligence consulting can cover areas including:

• Market sizing and attractiveness
• Industry and sector analysis
• Competitor benchmarking
• Market share assessment
• Customer and revenue analysis
• Growth opportunity assessment
• Pricing and commercial drivers
• Competitive positioning
• Industry trends
• Commercial risk identification
• Synergy assessment
• Investment thesis validation

The scope can be tailored to the transaction and the questions that matter most to the investor.

For example, an investor may want to understand whether a target’s projected growth is realistic. Another may need to determine whether the target has a defensible market position. A corporate acquirer may be more focused on customer overlap and potential synergies.

Rather than applying a one-size-fits-all framework, the diligence process should be built around the specific investment thesis and risks of the transaction.

For businesses and investors conducting due diligence in London or evaluating acquisition opportunities across the UK, Platform01 can provide an independent commercial perspective alongside financial, legal and operational diligence.

The goal is ultimately straightforward: to help decision-makers understand not only what a business is worth today, but what its commercial fundamentals suggest about its future potential.

How a Commercial Due Diligence Process Can Support an Acquisition

A typical process may move through several stages.

Step 1: Define the investment thesis

What makes the target attractive? What assumptions are driving the proposed transaction?

Step 2: Assess the market

How large is the addressable market? Is it growing? What structural trends are shaping it?

Step 3: Analyse competitors

Where does the target sit within the competitive landscape? What advantages or vulnerabilities does it have?

Step 4: Analyse customers

Who buys from the target? Why do they buy? How loyal are they? What could cause them to leave?

Step 5: Validate growth assumptions

Are management projections consistent with market realities? Can the business realistically capture the projected market opportunity?

Step 6: Assess risks and opportunities

What could cause the investment thesis to fail? Conversely, where might there be upside that has not been fully captured?

Step 7: Form the investment conclusion

The final output should bring the analysis together into a clear assessment of the commercial attractiveness of the transaction.

Choosing Between Commercial Due Diligence Companies

Not all commercial due diligence companies approach a transaction in the same way.

When selecting a diligence provider, investors should consider whether the team can go beyond producing a standard market report. The value of diligence lies in the ability to connect market data with the specific investment question.

A strong diligence process should therefore:

• Challenge assumptions rather than simply repeat them
• Distinguish market trends from company-specific performance
• Identify the real drivers of growth
• Test the sustainability of revenue
• Quantify commercial opportunities where possible
• Identify risks that could undermine the investment thesis
• Translate findings into actionable conclusions

For high-value transactions, the objective should not simply be to produce a large report. It should be to give decision-makers greater confidence in the decision they are about to make.

Conclusion: What Tesco–Booker Tells Us About Commercial Due Diligence

The Tesco–Booker acquisition demonstrates that M&A is ultimately about more than bringing two businesses together. The success of an acquisition depends on whether the underlying commercial assumptions hold true.

• Is the market attractive?
• Is the target competitively positioned?
• Are customers sustainable?
• Are growth assumptions realistic?
• Can synergies actually be achieved?
• Can the combined business create more value than the two companies could independently?

These questions sit at the heart of commercial due diligence.

The Tesco–Booker transaction is a useful reminder that a compelling strategic narrative needs to be supported by evidence. For investors and acquirers, rigorous commercial analysis can help identify the opportunities worth pursuing, the assumptions that need challenging and the risks that need to be addressed before capital is committed.

Ultimately, the purpose of commercial due diligence is not simply to validate a transaction. It is to help investors answer the question that matters most: “Given what we know about the market, customers, competitors and future growth potential, does this acquisition make commercial sense?”

For businesses evaluating their next acquisition or investment, that question can be the difference between simply completing a deal and creating long-term value.