Hayley M. Pizzey

  • Associate
  • Ehayley.pizzey@lw.com
  • 99 Bishopsgate
  • London EC2M 3XF
  • United Kingdom
  • T +44.20.7710.1005


Ms. Pizzey advises clients on a wide range of multi-jurisdictional litigation and regulatory matters, with an emphasis on commercial litigation, contentious data protection matters, and regulatory investigations. Specifically, she helps clients navigate:

  • Irish Data Protection Commission inquiries
  • GDPR compliance
  • Alleged data breaches and regulatory notifications
  • Regulatory inquiries and sanctions, and related litigation

She brings particular experience in claims in the High Court, the Court of Appeal, and the Competition Appeal Tribunal, as well as matters involving the Competition and Markets Authority, the European Commission, the Irish Data Protection Commission, and other data protection authorities around the world. 

Ms. Pizzey maintains an active pro bono practice and primarily represents the Royal Courts of Justice Advice Bureau and Malaria No More UK.


Ms. Pizzey's recent experience includes:

  • Advising Facebook in various litigation and regulatory inquiries, including managing and coordinating its global litigation and regulatory response in relation to a data breach   
  • Leading a large technology conglomerate’s response to potential claims arising out of a US$1 billion transaction   
  • Leading the Renesas Group’s defense to a follow-on damages claim for c. £400 million in connection with the European Commission’s Smart Card Chips cartel decision
  • Acting as lead advisor for a large global bank in a c. €60 million outsourcing agreement dispute   
  • Advising an large global bank on an expert determination with a value in excess of €50 million   
  • Advising a global retail and investment bank on potential claims under a multi-billion euro IT outsourcing agreement
  • Leading an international pharmaceutical company’s defense, and successful settlement, in a guarantee claim
  • Acting as trusted advisor for a large helicopter operator in relation to a number of commercial disputes with a helicopter manufacturer
  • Leading the negotiation a complex settlement for a large helicopter operator following a multi-million pound dispute with a helicopter manufacturer
  • Leading an international asset manager’s response to potential multi-jurisdictional enforcement action in respect of assets exceeding £100 million
  • Lead advisor to a German healthcare provider in respect of its termination rights under a consultancy agreement
  • Lead advisor to an international pharmaceutical company in respect of its termination rights under a supply agreement
  • Successfully settled a c. £65 million follow-on damages claim for a global technology conglomerate in a UK damages action following on from the European Commission’s DRAM decision
  • Acting for a high profile individual in the entertainment and media industry in an employment claim arising out of the alleged misconduct of Harvey Weinstein
  • Advising an international private equity firm on potential litigation against one of its portfolio companies intimated to be in excess of £50 million
  • Conducting an independent internal “systems and controls” review of a listed company
  • Advising a US$ billion organization on its obligations under a Deed of Settlement
  • Advising a foreign bank on its rights under an English loan agreement
  • Advising a private vehicle hire group on its obligations under a loan note instrument
  • Advising a private vehicle hire group on the enforceability of restrictive covenants
  • Advising a pharmaceutical company in respect of its potential fine liability for breaches of Articles 101 and 102 of the TFEU
  • Advising a private equity firm on a target’s exposure to follow-on damages claims following a cartel decision of the European Commission involving the target
  • Acting for one of the world’s largest web hosting companies in responding to a call for information from the Competition and Markets Authority
  • Advising an international corporation on its claims for confidentiality before the European Commission and the impact of UK damages actions
  • Advising an SME in its successful follow-on damages claim (funded by third party funders) in the Competition Appeal Tribunal*
  • Advising a mining company in its application for judicial review against a London Stock Exchange decision resulting in settlement*
  • Advising an SME in its application for judicial review against an Ofwat determination*
  • Acting for a foreign tour operator in an application for the appointment of provisional liquidators and a multi-million pound debt recovery claim*
  • Acting for a money transfer business in obtaining injunctive relief and its abuse of dominance claim in the High court resulting in settlement*
  • Acting for a retailer in its application for judicial review of an Office of Fair Trading decision to accept undertaking in lieu of reference*
  • Acting for a major airline in civil claims in the English High Court for damages arising out of price fixing cartel charges*

*Matter handled prior to joining Latham

Thought Leadership

  • Data Protection in Investigations -  February 02, 2022
  • Data Protection in Investigations -  March 04, 2021
  • Data Protection in Investigations -  April 23, 2020
  • High Court Rules on Confidentiality Claims in Competition Proceedings  -  April 22, 2020
  • UK Regulator Imposes Two Substantial Fines for GDPR Data Breaches -  July 12, 2019
  • Cartelized Products: In or Out of EEA? Only a Trial Will Tell  -  June 06, 2018
  • Group Liability for Data Protection Failure – A New Threat for Private Equity Firms?  -  December 13, 2017
  • Further Disclosure? Yes, but Not at Any Cost -  September 13, 2017
  • Rebalancing the Law on Asymmetric Jurisdiction Clauses -  April 11, 2017
  • Competition Appeal Tribunal Refuses Interim Relief in Pharma Pricing Case  -  February 01, 2017
  • Meeting Your Competitors – Think Before You Speak!  -  January 25, 2017
  • The Competition Appeal Tribunal Hands Down its Highest Ever Damages Award in a Flurry of Firsts -  August 02, 2016
  • Pyrrho Investments Ltd v MWB Property Ltd: A Landmark Decision on Predictive Coding in e-Discovery -  July 18, 2016
  • English Courts Reshape Cartel Damages Litigation Landscape in Air Cargo -  November 26, 2015

“Hayley Pizzey is a fantastic lawyer – she is extremely bright and has an excellent understanding of legal issues and commercial concerns. Her analysis of a case is impressive and her attention to detail is truly beyond compare.”

Legal 500 UK, 2022
Bar Qualification
  • England and Wales (Solicitor)
  • Legal Practice Course, College of Law, Guildford, 2008
  • LL.B, University of Surrey, 2006
  • Financial Institutions
  • Retail & Consumer Products
  • Technology
  • Communications Law
  • Antitrust & Competition
  • Litigation & Trial Practice
  • Complex Commercial Litigation
  • Connectivity, Privacy & Information