Professor Dennis Allan is an engineering consultant working in the area of electrical power systems technology. Prior to 1997, after 47 years in the transformer industry, he held the appointment of Director and Technical Manager for GEC-ALSTHOM Transformers at Stafford, England. Professor Allan was a Royal Academy of Engineering Visiting Professor in Principles of Engineering Design at UMIST, and a Visiting Professor in Power Distribution Engineering at the University of Manchester. He is currently Visiting Professor at the Univerdity of Newcastle. He is a Fellow of the Royal Academy of Engineering, the IEE, the I MechE and the IEEE. He has been Chairman of CIGRE Study Committee 12 (Transformers) and IEC Technical Committee 14 (Transformers). He is Chairman of the Management Board of AFAQ-EAQA, the International Certification and Accreditation Body serving the Electrical Industry.