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Base Quantum Ltd

Professional Description:

Quantum Expert Witness and Quantity Surveying Practice

Base Studios
Aldwych House
Area of work:

UK and International


Base Quantum has an excellent reputation as trusted providers to clients undergoing formal action relating to claims and disputes requiring a forensic quantum expert witness. Our team is influential in achieving positive and equitable settlements in some of the most substantial global construction disputes.

We are appointed from our offices in the UK and Ireland to projects across Europe, the Middle East, Africa, North America, South America and Asia.

We specialise in giving evidence in relation to all aspects of quantity surveying, including disruption and prolongation claims, variations, repricing and price adjustments, remeasurement, interim and final account disputes, and many other types of loss, cost or price-based claims.

Our clients include government bodies, large corporate organisations, major airports, and other leading transport, energy and infrastructure providers.

We are currently instructed as quantum experts on disputes ranging in value from below £50,000 to over £1 billion.

All of our testifying experts also act as ‘sub-experts’ where appropriate. When the testifying expert is otherwise engaged, focused on giving evidence, or in purdah, the sub-expert can continue to provide support to the legal team. This strategy is particularly effective when quantum is highly complex and forms a significant and wide-ranging part of the matters in dispute.

Duncan Hughes-Phillips
Chief Executive Officer
Duncan, founder and CEO of Base Quantum, is a chartered quantity surveyor and a member of the Expert Witness Institute with almost 30 years' experience in the engineering and construction industries. Along with ‘live’ experience working on major projects, such as the New Hong Kong Airport and the King’s Cross Station Development, he has had a long, formative career as a consultant on a diverse range of short-term, troubleshooting roles, working at all levels of the supply chain.

Duncan’s experience, particularly with specialist subcontractors, provides him with an in-depth grasp of the complex minutiae of construction technology. This, together with experience gained across many, often difficult, commercial situations, provides him with an excellent skill set for his role as a quantum expert.

Duncan provides detailed quantum analysis in a pragmatic and proportionate manner. He has undertaken analysis on major projects around the world, including on airports in the UK, Middle East and Africa, power stations in Africa, oil and gas projects in Australia and Iraq, and highways, hotels and holiday resorts in the UK, Asia and Eastern Europe.

Alongside his experience of testifying in major international arbitrations, Duncan regularly accepts instructions from across the UK on smaller disputes in adjudication, litigation and other forms of alternative dispute resolution. He continues to provide hands-on advice on live projects alongside his growing team at Base Quantum.

Duncan’s testifying experience includes several major, complex, high-value international arbitrations on construction projects, litigations in the Channel Islands and international investment treaty disputes.

Tom Taylor
Managing Director
Tom is a chartered quantity surveyor, quantum expert and managing director at Base Quantum. He has over 15 years’ experience in construction across a wide range of sectors, including energy, pipelines, civil engineering, and major infrastructure projects, such as airports, highways and marine structures.

He has worked throughout the supply chain on projects of all sizes in the UK and Europe, and on major construction projects whilst based in Africa and the Middle East. His varied career has provided him with hands-on experience of claims and commercial issues under various forms of contract.

More recently, Tom has been instructed as an expert witness in over 70 contentious matters of varying size and value. He has been appointed by public and private clients, contractors, and subcontractors in litigation, international arbitration and other alternative dispute resolution fora, in courts including the TCC in the UK. He has testified and been cross examined, both virtually and in person, as a party-appointed and single joint quantum expert. Tom’s recent experience of international arbitration proceedings relates to major projects in Africa, Europe, the Middle East and Australia.

Tom's subcontractor background enables him to recognise that his advice and opinions must be concise, practical, and proportionate. This focus on clear and effective output allows him to tackle the key issues of a dispute and is of particular value to clients.

John Delaney
BSc (Hons) PgDip (Con Law) FRICS FSCSI FCIArb AMAE
John is a chartered quantity surveyor and director at Base Quantum Ireland with over 19 years’ commercial experience across the construction and engineering industries. He is regularly appointed as quantum expert on matters in litigation and in various alternative dispute resolution fora.

As well as working as a quantum expert on multimillion-pound disputes, arbitrations and adjudications, John has provided claim preparation and management on numerous projects. He has also assisted the appointed expert on high-value international arbitrations in the construction, engineering and oil and gas industries, including on an investment treaty dispute.

John has extensive experience across a broad range of sectors, specifically construction, civil engineering and gas pipelines. His commercial and project experience includes road, rail, the London Underground, IT systems, and buildings, ranging from mixed-use, high-rise and residential, to commercial, industrial, health and local authority. John has significant experience in multiple forms of contract, including NEC, JCT, FIDIC and bespoke.

His appointments as a quantum expert have been on matters before the Court of Session in Scotland, the High Court in Ireland and a County Court in the UK, as well as in mediation, arbitration and regarding various statutory adjudications in the UK. John is also regularly engaged to offer expert opinion on quantum related issues in matters of professional negligence.

Further to holding qualifications in construction law, international arbitration and construction adjudication, John is a Fellow of the Chartered Institute of Arbitrators, Royal Institution of Chartered Surveyors and Society of Chartered Surveyors Ireland, as well as a practising member of the Academy of Experts.

From Base Quantum Ireland’s Dublin office, John continues to serve clients across Ireland, Europe, the UK and the Middle East.

Tony Clough
BSc (Hons) GDipLaw FCIArb MAE
Tony has 20 years’ experience as an adjudication practitioner and quantum expert witness, conducting adjudications as both an advocate and a quantity surveying expert. He is a Fellow of the Chartered Institute of Arbitrators and a practising member of the Academy of Experts.

Tony has experience acting for a wide range of clients, from specialist subcontractors to major international corporations and large public sector bodies. He has been responsible for carrying out the analysis of large and complex disputes covering defective works, the valuation of additional, varied and remedial works, loss and expense and damages.

Acting as a party representative for clients and, more frequently, as an expert or technical adviser to the client’s legal team, Tony provides clear, concise, thoroughly researched and well-reasoned reports for use in litigation, adjudication or mediation. He also provides independent and objective advice to contractors and legal representatives on the strengths and weaknesses of claims to assist in the negotiated settlement of long-running disputes.

Tony has also acted as part of a larger expert team on projects covering professional negligence, the valuation of works and damages claims, ranging in value from below £50,000 to over £750 million. Liaising with colleagues, he helps to ensure that a consistent approach is adopted and the highest standards are maintained.

Tom Walters

Tom is an experienced commercial and construction claims practitioner with over 15 years’ experience working in the UK construction industry and, more recently, in the Middle East (Qatar).

Tom has predominantly worked for main contractors, however he also has experience working for consultants, including lead designers on major state projects. Tom successfully completed the LLM in Construction Law and Adjudication, achieving a distinction from Robert Gordon University in Aberdeen. He has a strong background in dispute resolution and preparing and defending construction claims.

Rob Baker
Associate Director

BSc (Hons) MRICS
Rob’s experience includes:
Civil engineering projects, including rail and highways.
Residential projects including high-rise buildings and fire safety issues.
Contracting, including cost value reconciliations, change management, tendering and procurement.
NEC compensation event assessments

George Melo
Associate Director

BEng (Hons) MSc FCIArb
George’s experience includes:
Lead quantum analyst in offshore LNG facilities arbitration in Australia.
Lead quantum analyst in combined-cycle power plant arbitration in Africa. Lead quantum analyst in geothermal heating system arbitration in Central Asia. Lead quantum analyst in airport arbitration in the Middle East.
Report drafting and quantum analysis in numerous matters and types of claim.

Peter Philippo

Peter is a Chartered Quantity Surveyor and Fellow of the Royal Institution of Chartered Surveyors with over 31 years’ experience within the construction industry serving employers, main contractors and subcontractors across the UK and overseas. His experience includes such issues as professional conduct (negligence), loss and/or expense, certification, forensic quantum analysis, assessment and apportionment of damage, contractual interpretation and procedural matters. He has extensive experience dealing with traditional and bespoke construction and engineering contracts in the UK and internationally.

For over 12 years Peter has been regularly instructed as quantity surveying or quantum expert in numerous matters involving professional negligence, quantity surveying practice, quantum evaluation, and the assessment of claims/damages. He also frequently assists both counsel and solicitors with complex quantum issues.

He is a Practicing Member of the Academy of Experts and has contributed regularly to articles and papers in the Construction Law Journal, Contract Journal, and Quantity Surveying News, and sat on the Governing Council of the Society of Construction Law for over nine years.

Kevin Trash

Kevin has over 30 years’ experience in the construction industry in both professional practice and contracting environments. He has worked on projects and in dispute resolution across a broad spectrum of sectors, including construction, building service installations, civil engineering, oil and gas, infrastructure and transport, waste to energy, remedial treatments, chemical damp-proof course installations, and tanking. Kevin also has substantial experience in renovation projects and structural repairs.

Kevin has been deployed on behalf of employers, main contractors and subcontractors in a range of dispute resolution fora, including mediation, adjudication, litigation and arbitration. He has been appointed as an expert over 40 times, including in matters of professional negligence concerning construction professionals – particularly project managers and quantity surveyors. Kevin has testified in arbitration and adjudication proceedings in the UK and abroad and is well-regarded for his performance when being cross-examined. He has also acted as a coordinating expert in multi-million-pound and multi-discipline disputes where numerous experts are appointed.

Lastly, Kevin has been deployed in project rescue situations seeking to mitigate commercial and programme impacts to ensure delivery. Such work ensures his project experience is current and practical, which is highly beneficial in his appointments as an expert.

Danny Frost
Managing Director

BSc (Hons) MRICS
Danny’s experience includes:
Commercial lead for the contractor in obtaining a £120m highway scheme in southern England and the procurement of all major suppliers. Fully conversant with standard forms of JCT, NEC and ICC.

Provides training on the practical use of JCT and NEC for both clients and contractors. Acting as assistant expert witness on a dispute concerning a term maintenance contract Quantum assessment of loss and expense claim involving both prolongation and acceleration on large private hospital and quantum assessment in respect of anticipated construction cost of £60m residential development.

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