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4 New Square is a leading commercial set of barristers, comprising 80 independent practitioners of whom 26 are Queen's Counsel.

We act as specialist advocates and advisers in a wide range of civil disputes, both domestic and international, and as expert advisers in non-contentious matters. Some of us also act as arbitrators and mediators.

In all our work we aim to:

  • provide an excellent, efficient, service to all our clients
  • give sound practical advice and explain legal issues in clear terms
  • be approachable and work as a team with our clients and their other professional advisers 

Contact Us

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For all meetings at 4 New Square, please go to 2 New Square.

4 New Square
Lincoln's Inn
London, WC2A 3RJ

Tel: +44 20 7822 2000
DX: 1041 London Chancery Lane

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Latest News


Abbey Forwarding (in liquidation) v HMRC

Leigh-Ann Mulcahy QC and Nick Broomfield of 4 New Square successfully represented Abbey Forwarding Limited (in liquidation) in a landmark insolvency case which concerns the principles on which a Court will require and enforce a cross-undertaking in damages by HMRC when applying to appoint a provisional liquidator: Abbey Forwarding Limited (in liquidation) v HMRC [2015] EWHC 225 (Ch). The full judgment can be found here.

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The Secretary of State for the Home Department -v- Raytheon Systems Limited

e-Borders £200+ million arbitration award set aside in its entirety for "serious irregularity" and fresh hearing ordered. Roger Stewart QC, Leigh-Ann Mulcahy QC and Katie Powell (together with Malcolm Sheehan QC), instructed by Pinsent Masons and the Home Office Legal Advisers have acted for the Secretary of State for the Home Department (the "Home Office") on a successful application made in the High Court to set aside a £200m+ arbitration award made by an arbitral tribunal last year.

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4 New Square successful in TCC dispute: Restitution in the Construction Context

Michael Ryan successfully represents contractor in TCC dispute over construction joint venture.

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