Duncan Cartlidge FRICS is a Chartered Surveyor with extensive experience in the delivery and management of built assets, as well as providing education and training to a wide range of built environment professionals and contractors. He is the author of several best-selling books, including The Quantity Surveyor’s Pocket Book (4th edition), The Construction Project Manager’s Pocket Book (2nd edition) and The Estimator’s Pocket Book (2nd edition). www.duncancartlidgeonline.com