The statement mentions this expectation for customers, not sure if applies to investees.
"As part of the on-boarding and periodic customer due diligence processes, all customers are assessed to determine if they fall within the scoep of the Act, and, if so, a copy of their Anti-Slavery Statement is sought and retained. Furthermore, in relation to trade finance, all transactions are subject to checks to ascertain that the goods and country of origin are not prohibited under its Anti-Slavery policy and procedures." (p.3)