NEW YORK (Reuters) – Goldman Sachs Group Inc was involved as an underwriter and an investor in Lloyds Banking Group Plc's 23.5 billion pound (US$36.1 billion) refinancing in late 2009, the Financial Times said on Thursday, citing four people involved in the capital raising. Goldman demanded last-minute changes to the structure of the transaction, the newspaper said, citing the people. This had the effect of benefiting Goldman's position as a bond investor, the newspaper said. Bankers at Goldman say the company's ethical walls bar underwriters from knowing how its proprietary traders invest, the newspaper said. Goldman was hit last Friday...