This Approved Code of Practice (ACOP) and guidance is for those who work or control work in confined spaces. It explains the definition of a confined space in the Regulations and gives examples. It will help you assess the risk of working within a particular confined space and put precautions in place for work to be carried out safely. This edition brings the ACOP up to date with regulatory and other changes. The guidance has been simplified to make the understanding and use of the document easier, particularly in clarifying the definition of a confined space. Other changes include: