As Britain's financial sector slowly emerges from the recent crisis, the extraordinary support from which the country's banking system has benefited is likely to be gradually withdrawn, Moody's Investors Service said in a new Special Comment "Phasing Out Extraordinary Support Assumptions from UK Bank Ratings". As a result, Moody's expects that, over the next one to three years, it will phase out the extraordinary support assumptions currently incorporated into the senior debt and deposit ratings of a number of UK financial institutions and revert to its lower, pre-crisis support assumptions. Any resulting rating migration is expected to be gradual. These increased support assumptions have provided stability for the senior debt and deposit ratings of some banks whose stand alone bank financial strength ratings have been downgraded by Moody's during the crisis, in many cases by several notches and to non-investment grade levels - an indication of their fragile stand alone creditworthiness.Barclays Bank Plc has A$250 million of September 2013 bonds outstanding and its Australian branch has A$1.965 billion of bonds outstanding with maturities ranging from July this year to September 2014. The bank has a senior debt rating of 'Aa3' and BFSR of 'C'.The Australian branches of Bank of Scotland Plc and Royal Bank of Scotland Plc have A$525 million and A$2.1 billion of bonds outstanding in the domestic market respectively, which are not guaranteed by the Australian government. Royal Bank of Scotland Plc also has A$1.9 billion of kangaroo bonds outstanding.Bank of Scotland Plc has a senior debt rating of 'Aa3' from Moody's with a bank financial strength of only 'D+'. Ratings of 'Aa3' and 'C-'are assigned to Royal Bank of Scotland Plc.HSBC Bank Plc is in a slightly better position with a senior debt rating of 'Aa2' and a BFSR of 'C+'. It has A$1.5 billion of kangaroo bonds outstanding (issued just the week before last) and its Australian branch has A$2.4 billion of bonds outstanding.