Lucy specialises in large-scale collective redress. She has particular expertise in opt-out collective actions brought before the Competition Appeal Tribunal and opt-in claims via a GLO. 


Lucy started her career in the competition group at Slaughter and May, following which she moved to the Office of Fair Trading (now the Competition and Markets Authority) and then to Which?, where she advised on competition and consumer law matters. Lucy joined Hausfeld in 2017 and her expertise has proven invaluable in its filing of two opt-out collective actions under the UK’s class actions regime introduced by the Consumer Rights Act 2015. Notably, Lucy was part of the team which filed the country’s first standalone opt-out claims on behalf of rail passengers in 2019 and that which represented the Consumers’ Association (Which?) in its intervention in Mastercard v Merricks before the Supreme Court in 2020.

Lucy has experience of conducting litigation before the Competition Appeal Tribunal, High Court, Court of Appeal and the Supreme Court. She has worked on European and domestic antitrust investigations for public and private companies, as well as for the regulator, and has experience of working on high-profile merger transactions. Most recently, Lucy worked for client Privacy International in its intervention in the European Commission’s review of Google’s acquisition of Fitbit.


Lucy has worked on numerous pieces of highly complex, multi-jurisdictional litigation across a variety of sectors. Notable representations at Hausfeld include acting on behalf of 100+ corporate groups against British Airways in the Air Cargo litigation, for proposed class representative Justin Gutmann against train operating companies in the first standalone class actions to be filed in the UK and for the Consumers’ Association (Which?) in its intervention in Mastercard v Merricks before the Supreme Court. 

Passionate about achieving justice, including for those who cannot afford legal representation, Lucy has been involved in the running of a number of community law centres. 



Lucy Rigby engages actively on the details of the matters and proactively identifies prospective claims that may be suitable to bring before the Competition Appeal Tribunal. She's great with clients and never seems flustered.

Chambers UK, 2024

Lucy Rigby is quickly developing into one of the go-to partners for the most heavyweight competition claims. She is the complete lawyer.

Legal 500 UK, 2024

Lucy Rigby is the First lady of collective redress; percipient, poised and a powerhouse in any negotiation.

Legal 500, 2023

Lucy Rigby is an outstanding junior partner who is going places. She is extremely calm under pressure and always makes the right decisions. 

Legal 500, 2023

Lucy's rise, which has seen her jump from counsel to partner in just two years, is swift, but talent will out - she is an impressive litigator, and has a skill-set that Anthony Maton can rely on.

Global Legal Post, 2021