At end corporate responsibility started a project with GreenFlex, the sustainability consultant also assisting the Bank with annually evaluating the operational carbon emissions, in order to support the CEB with drafting a sustainable procurement policy and procedure and phasing in of sustainable selection criteria where appropriate. 308-2 Negative environmental impacts in the supply chain and actions taken As a non-physical service provider, the CEB’s ‘negative impact’ from its supply chain, as explained above, is mainly limited to its energy consumption, travel, paper and office materials bought, and waste produced.