Chancellor Rishi Sunak to unveil £15bn green gilt drive to assist net-zero ambition Chancellor of the Exchequer Rishi Sunak had today (1 July) outlined plans to transform the UK's financial services industry through £15bn of green bonds that will support projects that decarbonise key parts of the UK economy while improving climate resiliency and adaptation. A Green Savings Bond offered by National Savings and Investments (NS&I) will also help fund green projects Sunak is expected to announced that at least £15bn of green bonds – also known as a green gilt – will be set aside to help decarbonise areas of the economy such as power, mobility and the built environment at his first-ever Mansion House speech later today.