Experts


Vikki’s key experience

  • More than 25 years’ experience in forensic accounting covering all financial and accounting aspects of disputes
  • Appointed as expert in arbitration (such as ICC, LCIA, UNCITRAL, HKIAC, DIAC, QICCA, SCC and ICSID rules), litigation and expert determination
  • Given oral testimony in UK and International court and arbitration proceedings, including cross examination
  • Experience over a wide range of industries, including construction, real estate, aviation, energy, finance, mining, travel/leisure, IT and manufacturing, in a range of disputes, including investment treaty
  • Recommended by Lexology (formerly Who’s Who Legal) as a Thought Leader in its Arbitration Expert Witnesses category and as a Mining Consulting Expert
  • First class mathematics degree from Leeds and Paris Jussieu universities
  • Chartered accountant, fellow of the ICAEW and past chair of the advisory panel for its Forensic and Expert Witness Community

“Vikki provides clear analysis and presents it in a natural and easy to follow manner for the tribunal”

“Vikki is very user-friendly,”

“She is intelligent and a pleasure to work with”

Lexology 2025 listings:
Arbitration Expert Witnesses – Global Elite Thought Leader
Mining Experts – Recommended.

Vikki is “brilliant under cross examination”, “very impressive and a great communicator” and “she really knows the details of the case and doesn’t miss anything”.

Clients say that they “could not recommend Vikki more” and that she is “clear, decisive, very well organised and easy to work with”.

Previous Lexology/Who’s Who Legal listings

Liz’s key experience

  • More than 25 years’ experience specialising in forensic accounting covering accounting and valuation aspects of disputes
  • Appointed as the accounting or valuation expert in arbitration (ICC, LCIA, ICDR and ICSID rules) and litigation, both as a party appointed expert and a tribunal expert
  • Appointed as the expert to determine completion accounts disputes, earn-out disputes and value assessments
  • Given oral testimony in arbitration and litigation proceedings, including cross examination and concurrent evidence
  • Recommended by Lexology (formerly Who’s Who Legal) as a Thought Leader in Arbitration Expert Witnesses and as a Forensic Accountant Consulting Expert
  • Bachelor’s degree in law and post graduate diploma in legal practice from the University of Sheffield
  • Chartered accountant and fellow of the ICAEW
  • Trustee and chair of the Finance and Audit Committee at the British Institute of International and Comparative Law (BIICL)

“Liz is great to work with, very reasonable, thorough and detail-oriented”

“She produces excellent work”

“Her reports are well reasoned and clearly written”

Lexology 2025 listings:

Arbitration Expert Witnesses – Global Elite Thought Leader

Consulting Experts – Forensic Accountants – Recommended

Liz Perks “is brilliant, really fantastic” and “is our first port of call for arbitration proceedings

“[She] has great eminence and gravitas” and “the knowledge to win the most complex cases”

Liz is “an absolute delight to work with” according to peers who laud her for being “hardworking, accessible and clever

Previous Lexology/Who’s Who Legal listings

Debbie’s key experience

  • More than 25 years’ experience specialising in forensic accounting covering financial, valuation and accounting aspects of disputes, and competition matters
  • Appointed as expert in arbitration (ICC, LCIA, UNCITRAL, AAA and SCC rules), litigation (including Competition Appeal Tribunal) and expert determination
  • Given oral testimony in UK Courts and arbitration proceedings, including cross examination
  • Experience over a wide range of industries, including aerospace, construction, energy and renewables, financial services, information technology, manufacturing, natural resources, oil and gas, pharmaceuticals, real estate, shipping and transportation
  • Recommended by Lexology (formerly Who’s Who Legal) as a Thought Leader in its Energy Expert Witness category, and as an Arbitration Expert Witness and Forensic Accountant Consulting Expert
  • Bachelor of Science degree in finance and accounting from the University of Warwick
  • Chartered accountant and fellow of the ICAEW

“Debbie is very intelligent and a pleasure to work with”

“She is both fair and competent”

“I hold her in high regard”

Lexology 2025 listings:
Energy Experts – Thought Leader
Arbitration Expert Witnesses – Highly Recommended
Consulting Experts – Forensic Accountants – Recommended

Debbie is “revered as an individual who is continually appointed as an expert in high-stakes …disputes pertaining to the energy, resources and oil and gas industries

She is “incredibly diligent and can handle extremely complex issues and analyses with ease” and “her manner and approach inspires confidence and she performs well when giving evidence

Previous Lexology/Who’s Who Legal listings

Oleg’s key experience

  • More than 16 years’ professional experience focusing on the preparation of expert evidence on financial, valuation and fraud-related matters
  • Appointed as expert in international arbitration (ICC, LCIA, SIAC) and litigation proceedings in England and Europe and has given oral testimony
  • Experience over a wide range of industries, including financial services, retail, construction, hospitality, pharmaceuticals, manufacturing, energy, and oil and gas
  • Native speaker of Ukrainian and Russian languages with extensive experience of disputes and other forensic assignments across Eastern Europe and Central Asia
  • Recommended by Lexology (formerly Who’s Who Legal) in the Financial Advisory and Valuation – Quantum of Damages category
  • A Bachelor’s degree in Law from the University of Birmingham and a Master’s degree in Criminology from the University of Oxford
  • Chartered accountant (Fellow of the ICAEW) and Certified Fraud Examiner (ACFE)

Oleg Grynyuk is “a great expert” who is highly esteemed for “proposing great solutions” and being “realistic with tribunals“.

WWL Consulting Experts – Financial Advisory and Valuation – Quantum of Damages 2024