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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

05/05/2015

Conclusion of public hearings in Costa Rica v Nicaragua and Nicaragua v Costa Rica cases before the International Court of Justice

Katherine Del Mar appeared on behalf of the Republic of Costa Rica in two contentious cases before the International Court of Justice, involving claims of invasion and military occupation by the Republic of Nicaragua, and significant transboundary environmental harm.