 Lloyds Banking Group PLC LSE:LLOY could be hit to the tune of 1.6bn under plans being mooted to reduce the interest paid on deposits held by high street lenders at the Bank of England, according to research by a leading investment bank. The controversial plan has been floated in the media with Bloomberg carrying a comprehensive analysis of the back-door windfall tax, which it reckons could save the government 10bn a year. 