Rent review clauses in business leases have become increasingly complex over the years. This guide provides guidance on the wording of each part of such clauses and analyzes the areas of difficulty. The book deals with rent review clauses in business leases, and while it concentrates on the use and analysis of the more widely used reviews based on market rents, it also considers those calculated by alternative methods, such as the Retail Price Index, tenant's turnover, equity rents and headlease rents. There has been an explosion of case law in this constantly evolving area and this book considers and makes sense of the sometimes contradictory decisions. A number of rent review precedents are included in the appendices for easy reference.