Dennis Turner BA (Hons), FRICS, MCIOB has long experience as a quantity surveyor in private and central government practice, Head of Building Economics at The Robert Gordon University, Aberdeen, chairman of the Aberdeen and North East of Scotland branch of the RICS and contract consultant and lecturer to the construction industry. He is the author of several books, including Building Contracts: A Practical Guide and Design and Build Contract Practice.

Alan Turner JP, Dip Arb, FRICS, FCIArb is sole principal of Alan Turner Associates, providing advice in procurement and dispute resolution and acting as an arbitrator and adjudicator in construction disputes. In a forty year career, he has been a partner in Building Design Partnership, chairman of the National Joint Consultative Committee for Building and honorary secretary of the RICS QS Division. He has written Building Procurement and journal articles and lectured regularly on building contracts.