Stephen Kosmin

Stephen is highly regarded in administrative and public law, public procurement, financial services, and information and data protection law.

Stephen has considerable experience in complex and high-profile judicial reviews, particularly in commercial and financial services disputes. He appears frequently in the Supreme Court, Court of Appeal and High Court. Recently, he has been instructed by the Prime Minister, various central government departments, local authorities, the Financial Ombudsman, HMRC, the FSCS, and the Bank of England, as well as private clients. Stephen is a member of the Attorney General’s A Panel.

In his procurement practice, Stephen is instructed by both authorities and bidders.  Recent cases include James Waste v Essex County Council (concerning modifications to procured contracts), R (Good Law Project) v Prime Minister (a challenge to the award of Operation Moonshot contracts during the pandemic), Alstom v Network Rail (a challenge to the £1.8bn contract for signalling on the East Coast Main Line) and Altiatech v Birmingham City Council (concerning limitation and declarations of ineffectiveness).

Stephen is also a recognised expert in the field of information and data protection law, acting for a range of private and public sector clients on FOIA, GDPR, and DPA issues. Stephen has been instructed on several leading cases concerning mass data breaches, including Prismall v Google and Ticketmaster.