This note provides an overview of temporary works and associated roles and responsibilities. Although the industry has advanced considerably since the major collapses of the 1970s, current issues of concern remain. Whilst, for most projects, contractors and temporary works designers are the lead players, permanent works designers will always play at least two important roles: a technical one (the design of the permanent works determines what temporary works are needed and what the primary loads will be) and a managerial one (ensuring that appropriate contractual provision and arrangements are in place).