Barclays PLC (LON:BARC) first quarter total income rose 10% to £6.5bn, reflecting a 26% increase in net interest income to £2.3bn and a 3% rise in other income to £4.2bn. Operating expenses were 15% higher, including a £523m litigation and conduct charge, relating to the overselling of US securities and customer compensation relating to an old loan book. As a result, pre-tax profit fell 7% to £2.2bn. The £1bn buyback has been delayed for a second time. This is because of ongoing discussions with the SEC relating to the US securities scandal. Barclays says it’s committed to the programme and in…