Resources

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%…

Climate Change in the International Courts – Richard O’Brien KC, Anthony Jones and Camilla Cockerill

A discussion of the ECHR’s decision in Klimaseniorinnen and the ITLOS, Inter-American and ICJ Advisory Opinions. Join Richard O’Brien KC, Camilla Cockerill, and Anthony Jones as they…

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…

Emile Simpson joins 4 New Square Chambers

4 New Square Chambers is delighted to announce that commercial and tax junior Emile Simpson has joined chambers. Emile is shortlisted by Legal 500 as “International…

Attorney General Panel Appointments – Jonathan Worboys and Usman Roohani Appointed to B Panel

We are pleased to announce that 4 New Square Chambers’ Jonathan Worboys and Usman Roohani have been appointed to the Attorney General’s B Panel of Counsel….

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…

Jonathan Worboys to speak at Vienna Arbitration Days

7th June 2024 - 8th June 2024

4 New Square Chambers’ Jonathan Worboys will join a panel of highly regarded speakers at the upcoming Vienna Arbitration Days 2024. Austria’s foremost arbitration conference will…

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…

Lionel Nichols meets Norfolk Island delegation to advise on international law and human rights issues

On 14 November 2023, 4 New Square’s Lionel Nichols met with a delegation from Norfolk Island to provide advice on the international law and human rights…