§ PROVIDERS
PR.
UK Commercial Due Diligence Firms
Vetted directory of UK mid-market CDD boutiques and Big-4 deal-advisory comparators.
§ DIRECT ANSWER
UK mid-market CDD work runs across eight named boutiques (Lighthouse, OC&C, L.E.K., PMSI, Armstrong, Candesic, CIL, Eight) plus Big-4 deal advisory. All quote-only; none publishes a rate card. See the fee bench for indicative market-practice bands by deal size and scope.
§ IndexBoutique directory
- Lighthouse Advisory - lower mid-market
- OC&C Strategy Consultants - consumer / retail
- L.E.K. Consulting - healthcare / life sciences
- PMSI Strategy - business services
- Armstrong Transaction Services - industrials
- Candesic - healthcare specialist
- CIL Management Consultants - generalist
- Eight Advisory - cross-border
- Deloitte Deal Advisory - Big-4 comparator
- Big-4 vs boutique decision matrix
- OC&C vs L.E.K. compare
- Lighthouse vs Armstrong compare
§ RelatedM&A advisors (not CDD providers)
These firms are investment banks that advise on the transaction itself. They do not perform commercial due diligence; on their deals CDD is a separate workstream commissioned from a boutique above or Big-4 deal advisory. Listed here because they are often searched in a CDD context.
- Houlihan Lokey - M&A advisory, restructuring, valuation
- Lincoln International - mid-market M&A advisor
- William Blair - middle-market M&A advisor
VERIFIED 21 JUN 2026NEXT REVIEW 21 SEP 2026SRC: Firm public material; indicative market practice