Five investors have been removed from the United Nations-backed Principles for Responsible Investment (PRI), in the first such move by the group for those failing to meet its minimum requirements. The delistings follow criticism in recent years that the PRI was not doing enough to ensure members lived up to the principles, including to embed environmental, social and governance-related issues in their investment decision-making. The new standards require members to have a responsible investment policy covering at least half of all managed assets, staff responsible for implementing it and senior-level oversight. The PRI said it now plans to toughen membership requirements further and will launch a consultation at a meeting on Oct 21.