On the 2nd February 2021 GPC were part of a group of UK organisations representing business, investors, trade unions, academia, and civil society led by E3G who wrote to the Chancellor of the Exchequer concerning the planned National Infrastructure Bank (NIB). The joint letter was accompanied by a design briefing paper which describes key design objectives and priorities that the NIB needs to address to meet its mandate successfully. GPC believes that the experience of the Green Investment Bank, before and after privatisation, has provided learnings that should be heeded in designing the new NIB.