This guidance is to support organisations implementing the TrACE Toolkit, ensuring that they consider all aspects of their physical and social environment and the impact that it can have on staff, service users and anyone else who accesses the organisation. It is relevant to all those who are actively seeking to make their organisation’s physical environments more TrACE-informed. It seeks to illustrate that even small changes can have a big impact on how people interact with, and experience, an environment and that all organisations can seek to improve their physical environments regardless of budgetary and other constraints. It emphasises the need for careful planning, design, and implementation to create safety and promote healing and well-being for those who experience the environment and seeks, as far as is possible, to resist re-traumatising people who use the space.