Stephen Kosmin

UK Bar

Stephen Kosmin regularly acts for and against regulators in large data breach cases. He is also involved in cases considering the evolution of this area of law and its interface with developing technologies, such as facial recognition.

"He is a pleasure to work with. Stephen is really strong on detail and calm under pressure."

"He has got a solid knowledge of data protection. His writing is clear and comprehensive."

Stephen Kosmin of 11KBW is a go-to senior junior for the Financial Ombudsman Service, which he often advises in the High Court in relation to jurisdictional challenges and judicial reviews. He also specialises in collective investment schemes, SIPPs and tax avoidance schemes.

"Stephen Kosmin is a go-to for complicated financial services judicial reviews and decision-making. He has great knowledge and skill."

"Stephen is a pleasure to work with. He is incredibly clever."

"Stephen is an excellent and knowledgeable junior. He is a very effective advocate."

Stephen Kosmin is a well-respected junior with demonstrable experience of acting in high-profile and high-value public procurement matters. He regularly advises clients in the transport and healthcare sectors and has experience working with local authorities and central government.

"Stephen is a very impressive barrister all round. He performs admirably and is regularly instructed in cases above his level of call. He is an all-round very impressive barrister."

"A go-to in this sector, who cuts through complex legal issues and is very good with clients and other professionals."

Stephen Kosmin is regularly instructed to bring and defend major challenges on behalf of local authorities, regulators and government departments. He appears before the Court of Appeal and Administrative Court, and offers considerable expertise in judicial review claims in the financial regulatory space.

"Stephen is very calm, thorough and good on the detail."

Stephen Kosmin has acted in numerous important judicial reviews and other challenges concerning human rights issues, such as privacy and access to welfare.

"Stephen is a fantastic litigator. He is an incredibly smart and diligent lawyer."