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News & Judgments: Richard O'Brien KC

News & Judgments
News & Judgments

Al-Haq v Secretary of State for Business and Trade Judicial Review


On 30th June 2025, the Divisional Court handed down judgment in R…

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Richard O’Brien KC acts for UK Government in successful resistance of Chinese Investment Firm’s Application to Delay Sale of UK Semiconductor Company over National Security concerns


The High Court has dismissed an application by FTDI Holding Ltd., a Chinese state-linked investment firm, for interim relief to delay the sale of its 80%…

4 New Square Chambers: Featured in The Lawyer’s Top 20 Cases of 2025


We are delighted that seven members of 4 New Square Chambers are involved in two cases listed in The Lawyer’s Top 20 Cases of 2025, showcasing…

Chambers & Partners UK Bar Guide 2025


We are delighted to announce that members of 4 New Square Chambers have achieved an exceptional 23 new rankings and 36 improved rankings in the Chambers…

Richard O’Brien KC acts for HM Treasury in successfully resisting appeal in £17 billion public sector pensions case: R (British Medical Association) v HM Treasury


On 17 April 2024 the Court of Appeal handed down judgment in R (British Medical Association) v HM Treasury [2024] EWCA Civ 355, an important public…

Two new silks for 4 New Square Chambers


We are delighted to share that two members of 4 New Square Chambers, Richard O’Brien and Shail Patel are to be appointed King’s Counsel. These appointments are…

Richard O’Brien represents the United Kingdom in landmark case before the European Court of Human Rights


Richard O’Brien represents the United Kingdom in landmark case before the European Court of Human Rights concerning state interception of communications. On 12 September 2023 the…

Richard O’Brien acts for National Crime Agency in its successful defence of its warrant in the Encrochat proceedings


Richard O’Brien acted for the National Crime Agency in its recent victory before the Investigatory Powers Tribunal (“IPT”) in the “Encrochat” proceedings. A group of lead…

What’s in a name? “A lot”, the press would answer


There has been a spate of recent cases where professionals involved as respondents in disciplinary proceedings have sought anonymity orders in their favour. Helen Evans KC…

63 members of 4 New Square Chambers ranked in the Chambers UK Guide 2022


63 members of 4 New Square Chambers have been ranked in the Chambers and Partners UK Bar Guide 2022 across a wide range of practice areas….

Richard O’Brien acts on behalf of the General Anti-Abuse Rule Advisory Panel (GAAR) in judicial review proceedings


The GAAR Advisory Panel (the Panel) is an independent body which since 2013 has produced opinion notices on whether tax arrangements and schemes referred to it…

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4 New Square Chambers Recognised in The Legal 500 Middle East: The English Bar Guide 2026


We are delighted that 4 New Square Chambers has once again been…

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Landmark Court of Appeal Decision – Mazur Appeal Allowed


This morning, the Court of Appeal (The Master of the Rolls, the…

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4 New Square contributors to the White Book 2026


We are pleased to report that 4 New Square’s Roger Mallalieu KC,…

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