Professional Notice

gb2 is a highly specialised consultancy service where partners guarantee excellence by being fully involved throughout every stage of the commission. Lean, flexible and highly motivated in helping you achieve the best solution. Our role is to skilfully guide you through every quantum aspect of dispute avoidance and dispute resolution based on thorough and accurate forensic investigation and analysis.

Our partners have a vast amount of experience working on some of the world’s largest and most complex engineering and construction projects on behalf of international lawyers, owners, contractors and consultants. Having worked for and within both employer and contractor organisations, we have a rare impartiality and insight enabling us to accurately measure client expectation to ensure we achieve results that are both realistic and fair.

Our long-standing expertise and reputation for objectivity means we are regularly appointed to act as an expert witness in intricate and often high-profile engineering and construction dispute resolution cases. We have testified in all forms of dispute resolution including litigation, arbitration, adjudication and mediation.

gb2 has an experienced team at all levels. We have the resources to work with you in any capacity, whether the task in hand is large or small; irrespective of geography, sector of the industry or complexity of the project. Our increasing resources allow us to give you the time and level of dedication to deliver an outstanding service.


In construction and engineering, the ability to bring clarity and propose solutions is highly valued by clients. At gb2, we offer the full range of dispute avoidance services, including: Project review; Trouble shooting; Assistance with project turnaround; Claims review; Provision of strategic advice; Provision of mediator.


Whatever the dispute, we offer you sound and practical dispute resolution advice based on unrivalled experience. Our aim is always to deliver clear, precise and persuasive opinion. We are regularly appointed to act as quantum expert, single joint expert, court appointed expert and/or as quantum advisor in connection with: Litigation; Arbitration; Mediation; Adjudication; Expert determination.


Hands-on investigation and analysis forms the backbone of our quantum and delay forensic consultancy. Our Quantum and Delay services include: Cost audits; Project audits - cost and time; Cost analysis; Measurement and valuation of Bills of Quantities and variations; Procurement; Rates and pricing analysis; Valuation of claims for loss and/or expense including prolongation, acceleration and disruption; Valuation of claims for termination; Quantification of damages; Review of irregular project accounting; Program review and project time risk management advisory services; Forensic critical path analysis - identification of critical path location and incidence, extent and potential causes of delay for quantification of prolongations costs and accelerative measures deployed; Extension of time claim review; Loss of productivity analysis for the quantification of disruptive events. 

Gb2 has offices based in the following locations:

London office:

Adam House, 7-10 Adam Street, London WC2N 6AA

Tel:  +44 (0) 20 7520 9330

Leeds office:

St Paul's House, 23 Park Square South, Leeds LS1 2ND

Tel:  +44 (0) 113 512 9070

Brisbane office:

13/100 Edward Street, Brisbane, Queensland 4000

Tel:  +61 (0)7 2101 4660

Sydney office: 

Level 15, 175 Pitt Street, Sydney, New South Wales 2000

Tel:  +61 (0)7 2101 4660

Melbourne office: 

18/15 William Street, Melbourne, Victoria 3000

Tel:  +61 (0)7 2101 4660

Perth office: 

152 St Georges Terrace, Perth, Western Australia 6000

Tel:  +61 (0)7 2101 4660

New Zealand office: 

203/24 Garden Place, Hamilton 3204, New Zealand

Tel:  +64 (0)7 838 3704