Lloyds Banking Group Plc agreed to buy Bank of America Corp.’s MBNA credit-card business in the U.K. for 1.9 billion pounds in cash, marking its first major deal since being rescued by British taxpayers eight years ago. The acquisition of MBNA, which has about 7 billion pounds of assets, will add 650 million pounds a year to Lloyd’s revenue, equivalent to a 4 percent increase, according to a statement Tuesday.