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Clifford Chance

Clifford Chance
Harriet Slack

Harriet Slack

Senior Associate

Senior Associate
Harriet Slack

Harriet Slack specialises in large scale commercial litigation including fraud litigation, M&A disputes, accounting disputes and tech disputes. She also has experience in white collar crime cases (both in US and UK) and extradition proceedings. Harriet has also advised on anti-bribery related matters.

  • Representing an individual in extradition proceedings brought by the US Government.
  • Representing the founder and former CEO of Autonomy Plc defending a $5bn claim brought by HP in the English High Court arising out of HP's $11bn acquisition of Autonomy in 2011. This was a substantial and high value commercial case and the trial lasted 10 months. It was the largest civil fraud claim ever filed in the UK.
  • Carrying out numerous anti-bribery due diligence exercises in the context of corporate acquisitions and carrying out an anti-bribery risk assessment of a European company, entailing interviews with senior officers, reviews of policies and procedures and written reports.
  • Client secondment to the litigation team at a global bank.

News and client work

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Contact details

Career and qualifications

  • Durham University (BA) 2007
  • Joined Clifford Chance 2011
  • Admitted as a solicitor in England & Wales 2013
  • Senior Associate since 2018

Professional bodies

  • The Law Society of England and Wales