M&A advisor for UK SME owners

Mastella is a senior-led M&A advisor for UK owner-managed businesses worth £5M to £50M in enterprise value. We work on confidential, off-market sell-side mandates, management buyouts, growth-capital rounds, and selective buy-side work for clients running active acquisition programmes. The full service detail is on the services page and the stage-by-stage process on the process page.

Valuation and readiness are different questions. A multiple estimates what a business like yours is worth; readiness decides how much of that a buyer pays in cash at completion and how much is deferred, tied to an earn-out or held back against warranties. The measures buyers test, and the thresholds for the core ones, are set out on how we score exit readiness, and you can score your own business with the free Exit Readiness Score.

Within sell-side, we handle full sales, majority sales, minority sales, and structured transitions including dual-track processes that combine MBO and trade-sale tracks. Within growth capital, we work on minority rounds with PE and family office investors, majority rounds, and pre-exit funding designed to support a value-creation push before a planned sale.

Within buy-side, we typically work with established acquirers on specific targeted acquisitions rather than open-ended buy-side mandates. We have run buy-side mandates for boards executing buy-and-build strategies in defined sub-sectors.

We do not do general business broking, off-the-shelf valuation reports for tax purposes, or compliance-driven work. Where those are what you need, we will refer you to specialist firms we trust.

We work with owner-managed UK businesses worth between £5M and £50M in enterprise value, across six sectors: business services, healthcare services, light industrials, logistics and distribution, professional services, and tech-enabled services. See the sectors hub for the detailed sub-sector coverage.

Our typical client is a founder or partner group 12 to 24 months from a target exit, growth-capital round or capital event. The financials are real, the team is credible, and the business has reached the point where a structured competitive process across the right buyer pool will materially outperform either inbound approaches or a single-buyer negotiation.

We do not work with businesses below £5M EV. At that scale, a quality broker network typically serves owners better than a senior-led firm can. We do not run mandates where the owner is committed to accepting a specific approach already on the table; that is execution support, which fits a different mandate type and a different fee profile.

We do work hard to be straight in the first conversation. Forty-five minutes, no obligation, with an honest view on whether what you want to achieve is realistic and whether Mastella's model fits your situation.

Choose a UK M&A advisor by checking who runs the mandate day-to-day by name, sub-sector track record in the last three years, buyer-pool knowledge, fee structure, willingness to state the honest downside of choosing them, and bench depth beyond the lead advisor. The gap between the best UK boutique M&A advisors for a lower mid-market owner and the median firm is larger than it looks from the pitch meeting, so each is worth interrogating before you sign an engagement letter.

**Who runs the mandate day-to-day, by name.** The single most important question. Traditional UK M&A firms are structured around senior partners winning mandates and delegating substantive delivery to junior teams. The senior name in the pitch meeting frequently appears only at key buyer meetings and at completion. A boutique senior-led firm has the named senior person in every buyer meeting, every negotiation, and every material client conversation across the six-to-nine month mandate. Ask for a specific named commitment.

**Sub-sector track record in the last three years.** Generic 'we cover technology' or 'we do healthcare' is not track record. Named completed transactions in your specific sub-sector in the last three years is. Ask for the four or five most recent completed mandates in businesses like yours, at your rough size. Firms that cannot produce this shortlist do not have the current buyer-pool knowledge to run your process effectively, whatever their broader capability.

**Buyer-pool knowledge: specific and current.** Ask any firm to name the 40 to 80 buyers they would approach for your business, split by strategic vs PE vs overseas, and explain briefly why each is on the list. Firms that can do this from memory have the market intelligence to run a competitive process. Firms that answer with 'we will build the list once you engage us' are telling you where the work will start, not that it is already done.

**Fee structure: full, transparent, in writing before signature.** A good M&A advisor shares the full fee structure in the first serious conversation: retainer amount and duration, success fee tiers, expenses treatment, any minimum fees or long-stop provisions, tail-period arrangements. A firm reluctant to be specific about fees before the engagement letter arrives is a firm you should be careful about. Retainer-led fee models fund senior-led delivery; commission-only models economically drive junior delivery regardless of how the mandate is sold.

**Willingness to say the honest downside of choosing them.** The best M&A advisors will tell you, unprompted, where their model does not fit and where a different firm or a different transaction type would serve you better. If every firm you interview describes themselves as the right choice for every situation, you have learned nothing. The firm that says 'if your priority is X, firm Y is probably a better fit' is usually the firm to shortlist.

**Bench depth beyond the lead advisor.** Even a senior-led boutique needs analytical bench depth to deliver at the level of intensity a modern M&A process requires. Ask about the in-house team (analysts, associates, technology capability) and the wider network the firm draws on for specialist counsel. Boutique senior-led delivery only works when the senior person is genuinely leveraged by strong analytical support behind them.

The UK lower mid-market M&A landscape (£5M to £50M enterprise value) in 2026 remains structurally active despite macro-uncertainty at the larger end of the market, with PE consolidators, strategic acquirers and search funds all buying. Below is a snapshot of what is currently visible.

**PE consolidator activity.** UK-focused mid-market PE (Inflexion, LDC, Livingbridge, Bridgepoint Development Capital, HgCapital, ECI, HgCapital Mercury, August Equity, NorthEdge, Endless, Piper, Beech Tree, Bregal Milestone) all remain active for platform investments and add-ons across the £5M to £50M EV segment. Sector-specific consolidator strategies are visible in healthcare, tech-enabled services, business services and specialist logistics.

**Strategic acquirer activity.** UK and overseas strategic acquirers dominate certain sub-sectors: Big Four and larger consulting groups in professional services and applied AI; specialist FM and cleaning consolidators; healthcare service consolidators; European industrial and logistics groups acquiring for UK footprint. Overseas buyers (US, European, and increasingly Asian) have been consistently active for UK specialist manufacturing, applied AI, and tech-enabled services.

**Search fund activity.** Search funds have become one of the most active individual-buyer categories in the UK lower mid-market over the last three years, alongside PE and strategics. Institutional sponsors including Novastone Capital Advisors, Broadleaf Capital and First Search, plus a growing pool of independent searchers, actively approach £5M to £50M EV owner-managed businesses. See our pillar guide for the mechanics and how to evaluate a specific approach: UK Search Funds Explained.

**Multiples.** Sector-specific multiple ranges vary widely: healthcare services (dental, vet, mental health) 8 to 14x EBITDA; tech-enabled services (SaaS, MSP, cyber, AI) 6 to 12x EBITDA or 3 to 10x ARR for platform components; business services 5 to 9x; professional services 5 to 10x; light industrials 5 to 8x with premium ranges for specialist manufacturing; logistics 5 to 10x depending on sub-segment. Multiples within each range are driven more by structural characteristics (recurring revenue, customer concentration, management depth) than by macro conditions.

**Sub-sector heat.** Sectors seeing concentrated buyer interest in 2026 include: applied AI and vertical SaaS; healthcare services under the current consolidator cycle; specialist cold-chain and pharma logistics; cybersecurity managed services and GRC; specialist accountancy under continuing PE roll-up; and specialist manufacturing with international export exposure. Sectors seeing more discipline: pure haulage, generalist consulting without vertical depth, undifferentiated digital agencies, and services businesses with high founder concentration.

**Diligence sharpening.** Buyers across all sectors have tightened diligence on EBITDA quality, customer concentration and forward visibility, senior team retention arrangements, IP and contract assignability, and ESG/carbon disclosure. Owners arriving with clean data on each consistently complete at or above headline expectation. Owners going cold consistently re-trade at completion or lose deals in later-stage diligence.

**Timing.** For owners considering an exit in the next 18 to 24 months, starting structured readiness work now materially improves outcome. Pre-sale tax structuring, senior team build-out, financial reporting clean-up and buyer-pool intelligence all have 12+ month lead times where every month of preparation compounds into the final outcome. See exit planning for what the pre-process readiness work looks like.

A senior-led M&A advisor matters because the traditional UK lower mid-market model has senior advisors win mandates and then delegate the substantive delivery work to junior teams, with the senior advisors reappearing only at key buyer meetings and at completion. In a senior-led firm every conversation that matters runs through the senior advisor. Owners typically find out about this model only when they are inside it.

Mastella is structured around the opposite model. Every conversation that matters runs through Leo. Buyer mapping, financial normalisation, IM drafting, negotiation, completion mechanics. None of these are delegated. A small in-house team and a proprietary technology layer support the senior delivery rather than substitute for it.

This is funded by the retainer-led fee model rather than a deal-commission model. A low monthly retainer funds genuinely senior time across the mandate. A commission-only structure economically forces firms to deliver junior-led work to make the unit economics work, regardless of how the mandate is sold.

For owners running a single most important transaction in their commercial lives, the difference between senior-led and junior-led delivery is the difference between confidence and concern at every meeting that matters. It is also, in our experience, consistently the difference between a deal that closes at expectation and a deal that re-trades at completion.

If a senior-led process fits your situation, arrange a confidential conversation. Forty-five minutes, no obligation.