Heap and Digby Ltd


Heap and Digby are Chartered Engineers providing Expert Witness reports on a variety of electrical and electro-mechanical engineering disputes including electrical safety, electrocution, personal injury, power supply systems and project disputes. Trained in Court Procedures, JSE and Expert Determination.

Established in 1912 they have extensive experience in the design, operation and maintenance of high and medium voltage power systems, transmission lines, cables, substations and electrical distribution, the preparation of feasibility studies and project management.

Experience in building services includes conception design of the services in conjunction with the building team providing specialist input on power, lighting, fire alarms, security, CCTV and building management systems etc.


Company Director James Davies has more than 40 year’s international experience in electrical engineering.  He has worked as an Expert Witness since 1986 with court experience acting for both the defendant and claimant.  He is trained as Single Joint Expert and for Expert Determination.

 He has experience in:-


  • Power stations
  • Distribution and transmission lines and cables
  • Substations including transformers and switchgear
  • System protection and design
  • Electrical supply in buildings
  • Electrical machinery
  • Lighting
  • Lightning protection


He has prepared reports for the court on electrical installations, power system equipment, electrical machinery and apparatus, electric shock and contract valuations.

Appointments have been received from small, large and international solicitors including Irwin Mitchell, Crawford, Freshfield Bruchaus Deringer, Ewings & Co., Slaughter and May, Kennedys etc.

James Davies is a Chartered Engineer, Fellow of the Institute of Engineering Technology with international consulting experience in the design, operation and management of electrical generation, buildings and power systems in Africa, UK, Middle East and Micronesia.

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