DUNCAN MARSHALL, BSc, MCIOB, MIMBM was a Chartered Builder and Senior Lecturer at the University of the West of England, UK. DEREK WORTHING, BSc, MPhil, MRICS is a Chartered Building Surveyor and was formerly a Principal Lecturer at the University of the West of England, UK. He now works as a consultant and a Visiting Lecturer. He is also a Visiting Professor at Uppsala University in Sweden. ROGER HEATH, FRICS, FFB is a Chartered Building Surveyor and was formerly a Senior Lecturer at the University of the West of England, UK. He now works as a Visiting Lecturer. NIGEL DANN, BSc, MSc, MIOC, ICIOB was a Senior Lecturer at the University of the West of England, UK, and now works as a consultant and Visiting Lecturer in the UK, France and Belgium (KU Leuven).