Moody’s Investors Service has today downgraded the senior debt and deposit ratings of 12 UK financial institutions and confirmed the ratings of 1 institution. This concludes its review of systemic support assumptions from the UK government for these institutions initiated on 24 May 2011.

The downgrades have been caused by Moody’s reassessment of the support environment in the UK which has resulted in the removal of systemic support for 7 smaller institutions and the reduction of systemic support by one to three notches for 5 larger, more systemically important financial institutions. According to Moody’s, announcements made, as well as actions already taken by UK authorities have significantly reduced the predictability of support over the medium to long-term. Moody’s believes that the government is likely to continue to provide some level of support to systemically important financial institutions, which continue to incorporate up to three notches of uplift. However, it is more likely now to allow smaller institutions to fail if they become financially troubled. The downgrades do not reflect a deterioration in the financial strength of the banking system or that of the government.

In addition, the rating agency has assigned a negative outlook to the senior debt and deposit ratings of the banks that still incorporate two or more notches of systemic support, to reflect the likelihood of a further reduction in the availability of systemic support over the medium to long term.

The rating actions include a one-notch downgrade of Lloyds TSB Bank plc (to A1 from Aa3), Santander UK plc (to A1 from Aa3), Co-Operative Bank plc (to A3 from A2), a two-notch downgrade of RBS plc (to A2 from Aa3) and Nationwide Building Society (to A2 from Aa3); and downgrades of one to five notches of 7 smaller building societies. The ratings of Clydesdale Bank were confirmed at A2 (negative outlook).

Shares in some of the banks fell in response to Moody’s decision, which had already this week downgraded Italy’s credit rating to A2

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