The 2016 edition of the JCT Minor Works Building Contract contains a great many changes from the 2011 and 2005 editions, many of which are apparently minor but all are significant.
This 5th edition has been comprehensively re-written to address these changes and to make them easier to understand. Busy architects and contractors will find the book a ready source of answers when they have a question and a guide to what to do in various circumstances