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William Frain

Commercial Law Barrister

William Frain is dual-qualified at both the English and Scottish Bar, with over 24 years’ experience in commercial law, professional negligence, public law, and international arbitration. He maintains a busy domestic and global practice, particularly in the Middle East and international infrastructure disputes.

  • Commercial law, arbitration, international dispute resolution

  • Professional negligence, public law and judicial review

  • Real estate, construction and financial disputes

  • Mediation, institutional arbitration and ICSID claims

  • Cross-border enforcement and jurisdictional issues

William | Barrister Profile Photo

William's Biography

Areas covered

William’s expertise spans:

  • commercial litigation and contract disputes

  • professional negligence claims

  • public law and judicial review proceedings

  • international arbitration (ICC, LCIA, DIAC, ICSID, etc.)

  • real estate, development and construction disputes

  • enforcement, jurisdiction, cross-border procedure

  • mediation and alternative dispute resolution

Background

William Frain is ranked Tier 1 for Commercial Litigation, described in legal directories as “excellent in court; a joy to work with” and “persuasive and well prepared.” His practice combines domestic and international work, especially in large infrastructure, construction, property and financial disputes in the Middle East and globally.

He has significant experience in:

  • advising and representing clients in real estate and construction arbitrations and litigation

  • acting for UK investors in the “World project” collapse in Dubai in both arbitration and tribunal settings

  • leading a USD 250m construction arbitration and being junior in large global infrastructure disputes

  • participating in ICSID and other investment treaty arbitrations

  • handling jurisdictional challenges, enforcement across jurisdictions, and procedural strategy

  • engaging with institutional arbitration rules and complex disputes involving multi-party claims

He is also a CEDR-accredited mediator and a chartered arbitrator, with deep knowledge of jurisdiction, enforcement, and multi-front dispute strategy.

Qualifications

  • Called to the Bar in 2000

  • BSB Certified Barristers
  • Rated 4.5 Stars on Trustpilot (500+ Reviews)
  • Data Protection Assured
  • No-commitment Quote Provided
  • 20,000+ Cases Trusted With Us

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Knowledge Base

For more information on Direct Access, Commercial Law and working with our team visit our blog.

Professional Negligence Claims: FAQs
COMMERCIAL AND CONTRACT LAW
Professional Negligence Claims: FAQs
by Barrister Connect
How Do I Represent Myself in Court? A Guide for Self-Representing Litigants in England and Wales
DIRECT ACCESS
How Do I Represent Myself in Court? A Guide for Self-Representing Litigants in England and Wales
by Barrister Connect
What a McKenzie Friend Can and Cannot Do in Court
DIRECT ACCESS
What a McKenzie Friend Can and Cannot Do in Court
by Barrister Connect