Caroline Day


Criminal Litigation

"She's really excellent, very bright, very good tactically, very diligent and personable."

Chambers UK 2020 - A Client's Guide to the UK Legal Profession

"She is very collaborative in the way that she works. She has real determination and is a very impressive lawyer."

Chambers UK 2021

Caroline specialises in complex fraud and financial crime. She acts in cases of serious fraud, money laundering, corruption and cartels and has advised individuals and companies subject of investigations and prosecutions by various agencies including the Serious Fraud Office (SFO), the Financial Conduct Authority (FCA), HM Revenue and Customs (HMRC) and the Competition and Markets Authority (CMA) (formerly the OFT).

Caroline has recently been named in Global Investigation Review’s Top 100 Women in Investigations survey 2018. The survey profiles one hundred investigations specialists from around the world.

Caroline acts for corporates in complex investigations. She has conducted numerous internal investigations on behalf of companies and has a particular interest in cross border cases. Her experience extends to Mutual Legal Assistance (MLA) requests and extradition.

In addition, Caroline specialises in representing individuals subject of a broad range of criminal and regulatory investigations. She has extensive experience representing clients in compulsory interviews with the authorities, internal investigation interviews and interviews with the police, often leading to successful outcomes for her clients at an early stage of a case.

Alongside her fraud and general crime practice, Caroline represents members of the Chief Police Officers Staff Association facing disciplinary inquiries. She has public law experience; Caroline represented a number of military witnesses before the Baha Mousa Public Inquiry, and is currently advising in connection with the Independent Inquiry into Child Sexual Abuse, led by Professor Alexis Jay.

Notable cases

Fraud, financial crime and regulatory cases, and cartels

  • Advising individuals in relation to multi-jurisdictional SFO investigations, often including the involvement of overseas regulators
  • Advising an individual in relation to an on-going FCA insider dealing investigation
  • Advising individuals in relation to FCA compulsory interviews and section 2 interviews by the SFO
  • Acting for a number of Chief Constables in relation to allegations of corruption and misconduct in public office and disciplinary issues
  • Advising individuals in the FCA/SFO Libor and FX investigations
  • Advising an individual in relation to an investigation by the OFT and EC involving allegations of alleged cartel activity. 
  • Advising in a case brought by the Italian authorities into allegations of fraud

Internal investigations

  • Conducting a number of internal investigations on behalf of corporates in relation to allegations of financial crime and misconduct including fraud, theft, corruption, money laundering and environmental crime.

Public Inquiries

  • Advising clients in connection with the Independent Inquiry into Child Sexual Abuse, led by Professor Alexis Jay
  • Acting for a number of military witnesses in the Baha Mousa Inquiry investigating the circumstances surrounding the death of an Iraqi citizen under the care of the Armed Forces

General crime

  • Acting for a high profile individual in an Operation Yewtree investigation in allegations of historic sex abuse
  • Acting for a member of the Armed Forces facing an allegation of rape. The client was acquitted.


Publications, Press Highlights & Speaking Engagements


Professional societies and memberships


Related Services

Bribery and Corruption

We have a long track record of defending corruption investigations for individuals. Our expert lawyers can also advise on internal investigations.

White Collar and Financial Crime

Our experienced lawyers provide strategic and pragmatic advice in complex business crime cases and situations.

Cartels, Competition, Price Fixing and Anti-trust

Our top ranked cartels team is extremely well placed to provide advice to individuals and companies who are caught up in cartel activity.

Corporate Crime

Corporate crime is under the spotlight more now than ever before with an increasing appetite for corporate prosecutions.

Dawn Raids, Search and Seizure

When subject to a “Dawn Raid”, search and seizure operation and search order you require timely advice. Our specialist lawyers can provide the assistance you require.

Dealing with an Investigation

Under investigation? We ensure you have the specialist, strategic advice to help you manage.

Defending an Allegation

Someone has made an allegation against you. What is the first thing you do?


When fraud occurs the first steps are critical. Our unparalleled expertise will show you how to act.

Serious Fraud

Defending complex white collar cases successfully is what we are known for. The firm has the largest team of specialist criminal lawyers in the UK.

Internal Investigations

Corporate clients require sophisticated and sensitive advice when they encounter internal crises which have the potential to escalate.


When an individual or company is faced with a criminal or regulatory investigation we manage every step of the process.

Money Laundering

The UK’s anti-money laundering (AML) regime is amongst the most stringent. We represent both individuals and organisations in AML matters.

Mutual Legal Assistance

Robustly defending requests from foreign jurisdictions is not for the faint-hearted or inexperienced. Our lawyers are recognised leaders in the field.

Charities - Litigation, Crisis & Investigations

Our highly experienced team of litigation lawyers offer specialist advice covering a range of issues affecting charities.


We have a strong track record advising organisations on safeguarding, including on the statutory regime, best practice, and in responding to specific events and crises.

Criminal Litigation

Our criminal lawyers are astute, supportive and highly sophisticated, particularly known for providing strategic, sensible and practical advice.

Insight from Caroline

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