This Practice Note is part of the Environment new starters asset purchase transactions collection. It considers the tasks for environmental support needed in the post completion phase of an asset purchase transaction, the environmental health and safety (EHS) issues in due diligence reports and environmental audits, the need for environmental permit transfer or application for a new permit, the Energy Savings Opportunity Scheme (ESOS), obtaining reliance letters or collateral warranties in respect of environmental reports, and commissioning an environmental audit.