Anchored to UK statute. Last verified 21 June 2026. View source-of-record.

maduediligencechecklist.co.uk

The UK M&A Due Diligence Checklist

Big Four

EY UK - due diligence services


Strategy and Transactions arm with broad FDD, tax DD and integration-planning capability. Strong on TMT, FS and consumer.

Direct answer

EY UK is a Big Four transaction-services firm. UK fees are quote-only: the firm publishes service descriptions, not rate cards. Engagement scopes are issued per workstream after a 5-10 working-day discovery window.


Workstreams covered

  • FDD
  • Tax DD
  • Commercial DD
  • Integration
  • M&A advisory

Sector focus

  • TMT
  • Financial services
  • Consumer
  • Energy

Pricing approach

Quote-only. Engagement scoped per workstream. Big Four scope-creep risk on smaller deals; insist on capped fees and named partner accountability.

Source: www.ey.com - verified 2026-06-21.

When to instruct

Big Four scope tends to be disproportionate at sub-£20m EV unless the target is regulated, multi-jurisdiction or carries unusual tax complexity. Insist on capped fees and a named partner whose hours appear on the engagement letter.


Reviewed by Oliver Wakefield-Smith, Founder, Digital SignetLast verified 21 June 2026

This page is anchored to UK primary legislation and named regulator guidance only. Not legal advice. Confirm position with your appointed adviser before signing.