<sod >RBS, which is still 73 per cent owned by the government after its bailout in 2008, has emerged as the worst hit in the annual health check of the banking system.< eod>< sod > RBS, which is still 73 per cent owned by the taxpayer after its bailout in 2008, failed the stress test on all of the key measures, making it the worst performer among the UK's major lenders.< eod>