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Roger ter Haar QC

Call 1974 • QC 1992

"Brilliant at cross-examination." "He's very good in court and clearly understands what judges and arbitrators want to hear."
(Chambers UK 2017)

Roger ter Haar QC is an English QC who has practised as a barrister, adjudicator and arbitrator for 45 years at what is now Crown Office Chambers, Temple, London. He has had a wide practice that has been recognised by such directories as Chambers & Partners, which list him as a leading silk for International arbitration, construction and engineering, commercial dispute resolution, insurance, property damage, professional negligence, and energy and natural resources.  In June 2020 he decided not to accept fresh instructions as counsel so as to be able to focus upon sitting as an arbitrator and adjudicator.

He was nominated as Silk of the Year for construction in the United Kingdom twice and also for professional negligence. He was selected as International Arbitration Silk of the Year in 2012. His publications include Construction Insurance & UK Construction Contracts (co-editor), Emden’s Construction Law (contributor) and Remedies in Construction Law (author). He was editor-in-chief of the IBA’s publication Construction Law International.

Heacts as arbitrator and adjudicator, and sits as a deputy high court judge in the Queen Bench division, Technology and Construction Court, and Administrative Court within the English High Court of Justice.

He has acted as counsel in arbitration and litigation (current cases include a US $1 billion dispute arising of a project in Qatar, US $750 million construction dispute concerning an airport in the Middle East and a US $250 million ICSID expropriation arbitration).

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  • Deputy High Court Judge (2003)
  • Recorder (2003)
  • Boundary Commissioner (2000)
  • Bencher of Inner Temple (1993)
  • BA Jurisprudence (1973)
  • Magdalen College, Oxford


  • Hong Kong International Arbitration Centre Panel of Arbitrators (2013)
  • The Korean Commercial Arbitration Board Panel of International Arbitrators (2013)
  • Chairman, Inner Temple Estates Committee (1995 – 1999)
  • Former Chairman Lloyds Disciplinary Committee


“His instincts in understanding how to present disputed issues to a tribunal are brilliant. “

Legal 500 EMEA 2020

“Very detailed and exceptionally well prepared.” “A masterful advocate.” “He provides clear, thoughtful and well-considered advice.”

Chambers & Partners 2020

“Has a wealth of experience, and is an impressive advocate who can quickly get the measure of a witness or tribunal.”

Legal 500 2020

“An impressive advocate who can quickly get the measure of a witness or tribunal and tailor his cross-examination accordingly.”

Legal 500 2020

“Formidable in court, and his ability to absorb an argument that is made, digest it and articulate a response while on his feet is really impressive.”

Chambers UK 2018

“He is very experienced, very charming and a real leader in the field.”

Chambers UK 2018

“He makes complex matters look easy. He’s relaxed but devastating at cross-examination. It is a pleasure to listen to him and to work with him. His memory is virtually photographic, and he’s so lovely.”

Chambers UK 2018

“A very experienced, persuasive and effective advocate, who is popular with clients….an absolutely excellent strategist and one of the best on his feet.”

Legal 500 2017

“Well respected, with a badge of quality…outstanding experience…A popular choice for construction disputes and international arbitration.”

Legal 500 2017

“His ability to quickly grasp the relevant facts and get involved in the strategy of a case is excellent.”

Chambers UK

“He is incredibly clever in a broad way, not just about a particular topic but almost everything.”

Chambers UK

“Judges listen to anything he says’, ‘a well-established construction silk’.”

Chambers UK

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