U.K. Green Investment Bank Plc, the state lender put up for sale by the government, will be dramatically restructured if it’s sold to Macquarie Group Ltd., according to two people familiar with the matter. Australian bank Macquarie, seen as one of the most likely buyers, would divide the Green Investment Bank, or GIB, into at least two units, according to the people, who asked not to be identified because discussions are confidential.