Expert Witness Fundamentals

An expert witness is

The primary function of an expert witness is to express his independent expert opinion based on the information that is provided. An expert can be employed in different capacities for example at arbitrations, tribunals, and litigation.

A witness is a person giving sworn evidence to a tribunal or court of law. There are basically two types of witness:

  • Witnesses of Fact who may give evidence of fact but may not normally give opinions;
  • Expert Witnesses who may give opinion evidence within their expertise and in addition evidence of facts.


The Bar Council represents barristers in England and Wales. It promotes the Bar’s high quality specialist advocacy and advisory services, fair access to justice for all, the highest standards of ethics, equality and diversity across the profession, and the development of business opportunities for barristers at home and abroad.

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