Internal Investigations

Respond quickly, manage risk, and protect business value from day one. Whether you are dealing with whistleblowing claims, managing regulator scrutiny, or facing public fallout, you need legal advice that secures your business and reputation.

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How can Irwin Mitchell help?

We act for businesses, directors, and in-house teams through every phase of internal auditing, from early-stage reviews to high-stakes disclosure, enforcement, or prosecution. With experience across fraud, misconduct, and regulatory breaches, we become an extension of your team, guiding you with clarity.

From fact-finding to final outcome, we help you stay in control, reduce liability, and resolve the issue efficiently.

We can support with:

  • Internal investigation planning and strategy
  • Regulator reporting and legal privilege
  • Evidence gathering and disclosure
  • Employee interviews and data review
  • Risk mitigation and liability protection
  • Criminal defence and cross-border action.

You will also benefit from insight shaped by multi-sectoral real-world investigations, helping you run a defensible, commercially focused process.

Speak to a Legal Partner

Our team support you to navigate complexity, seize opportunity and move forward with legal clarity.

Contact our Specialists

Get strategic advice from a team that knows how to protect and grow your business. Please complete our enquiry form and one of our experts will contact you by the next working day.


Alternatively, you can call us now.


Our opening hours are Monday to Friday 8am to 6pm (Excluding Public Holidays).

0370 1500 100

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Making an enquiry

We have several ways you can contact us, either by completing our online contact form, by phone, or using our live chat. If you start your journey online, here are the first steps to working together.
  • contact us
    Complete our online form
    We need a few details to understand your situation and the kind of support you need.
  • Few questions
    We’ll contact you by phone
    On the call our experts will ask you a few more questions to make sure we connect you with the right legal advice from our team.
  • Appointment
    We arrange a full appointment
    Your next step is an in-depth appointment with a specialist solicitor to discuss how we could advise you.
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Why choose Irwin Mitchell?

Our expert team help many individuals and firms to conduct an internal investigation of their company, as well as advising on the various response options available to any external regulators and law enforcement agencies. We regularly come into contact with The Serious Fraud Office (SFO), the Financial Conduct Authority (FCA) and the Dept for Business, Energy & Industrial Strategy (BEIS).

 

If consulted early enough, we can also assist with internal audits, training and provide compliance advice to prevent a company becoming the victim of financial crime. We can help you with:

 

  • Reporting to prosecutors and regulators
  • A deferred prosecution agreement
  • Responding to compulsory information requests
  • Understanding the conduct of an internal investigation
  • Establishing whether there has been any unlawful conduct
  • Gaining immunity from prosecution (if possible)
  • Undertaking civil action to recover any losses.

If you wish to conduct an internal investigation, or need help to avoid an external investigation, you should seek immediate expert legal advice.

Our commitment to you

Our experts always start by listening, so we understand what matters most from day one.
  • 01
    Clear legal guidance

    You will always get straightforward, honest advice, with regular updates to keep you clear on the way forward.

  • 02
    Specialist knowledge

    A wide-ranging team of trusted specialists who understand what it takes to protect your future, your family or your business.

  • 03
    Your needs first

    Whether you’re navigating complex personal situations or business decisions, we take the time to understand your world and what’s at stake.

Other Business Crime services

Act decisively across complex allegations and regulatory action with advice shaped by real investigation experience. Whether you are responding to whistleblowers, dawn raids, or corporate fraud, we help you take control and stay protected under pressure.
  • Fraud

    Respond to complex fraud allegations with clarity. You will get tailored guidance across false accounting, director misconduct, and investment scams, built to defend your legal position and long-term business interests.

  • Dawn Raids

    Prepare for unannounced inspections with calm, strategic guidance. From legal privilege to post-raid follow-up, you will have support that helps you act fast and remain in control.

  • Deferred Prosecution Agreements

    Protect your business from full criminal prosecution with a tailored deferred prosecution agreement strategy. Get help with early engagement, compliance, and disclosure, aligned to your commercial interests.

  • Extradition

    Respond to cross-border investigations and extradition threats with confidence. We advise on arrest risk, INTERPOL red notices, and defences against removal, coordinating with foreign counsel where needed.

Recognised for excellence. Chosen for care.

  • Legal 500 Top Tier Firm UK 2026
  • Sunday Times Best Places to Work 2025
  • ePrivateClient Top Law Firms 2025
  • Chambers High Net Worth 2025