This publication started from the desire to provide an update to Managing Environmental Risks and Liabilities. In the five years since it appeared there has been a range of significant developments in the field of environmental risk assessment and management. There have been major changes in the risk-based regimes for dealing with contaminated land in both the Netherlands and the UK and environmental risk management standards have appeared from the US. At least three significant trends are apparent. The greater use of risk-based methodologies in regulation has been complemented by the application of risk management ideas in integrative initiatives within organisations. Finally, there has been increasing pressure for communication and transparency, reflecting societal desires for reassurance on the use of appropriate risk controls in organisations.