Fears for NAB in UK bank shock FRESH concerns have emerged over National Australia Bank's troubled British division after Royal Bank of Scotland shocked the market with a pound stg. 3 billion ($5.6bn) provision to cover the long-running fallout from mis-sold financial products. In a surprise profit warning, RBS unveiled a further pound stg. 465 million provision to repay payment protection insurance (PPI) and warned claims would probably "continue for a longer period," rather than decline as expected.