Bio
Rosio Cafarelli is a claimant-side competition litigation solicitor specialising in proceedings before the Competition Appeal Tribunal and the High Court. She has particular experience in collective actions, group litigation, and regulated sectors, including water, telecommunications, and digital markets.
Rosio is a solicitor in Scott+Scott’s London office, where she acts on behalf of the Class Representatives in 1601/7/7/23 Ennis v Apple Inc & Ors and 1696/7/7/24 Stasi v Microsoft Corporation & Ors.
Before joining Scott+Scott, Rosio acted for the Class Representative in the proposed collective action against six water companies before the Competition Appeal Tribunal and for claimants in the River Wye pollution group litigation before the High Court.
Earlier in her career, Rosio advised regulated businesses, technology companies, and infrastructure providers on competition, telecommunications, and economic regulatory matters. She also worked in-house in the public policy team of a multinational technology company.
Rosio has been published in peer-reviewed journals, including The Journal of Water Law and The Solicitors Journal.
Rosio is a native Spanish speaker.
Education
- University of Sheffield (LLB, Law and International Law 2014)
- London School of Economics and Political Science (MSc., Economic Regulation, 2015)
- University of Law (Legal Practice Course, 2016)
- King’s College London (GPD, Economics for Competition Lawyers, 2020)
Admissions
- England
- Wales
Representative Cases
- Acted for the Class Representative in the proposed opt-out collective proceedings against six water companies in 1603/7/7/23, 1628/7/7/23-1631/7/7/23 & 1635/7/7/24, Professor Caroline Roberts v Severn Trent & Others [2026] EWCA Civ 222.
- Acted for individuals and businesses affected by pollution of the River Wye in Evans v Avara Foods Ltd & Others (KB-2025-003040).
- Acted for interveners supporting Ofcom (Colt, Three and Vodafone) in the 2016 Business Connectivity Market Review appeal before the Competition Appeal Tribunal, BT v Ofcom [2017] CAT 25.
- Acted for TalkTalk in its successful challenge to Ofcom price controls in TalkTalk v Ofcom.
- Acted for Joanna Bateman in proceedings against South West Water relating to sewage pollution.
- In-house at the public policy team at Meta.