NAB's Clydesdale Bank should be able to generate reasonable profits over the next two years, in spite of difficult economic conditions in Scotland and Northern England, Standard & Poor's concludes in a review.S&P said yesterday that it had affirmed the BBB+ long-term rating and A-2 short-term rating of NAB's Clydesdale Bank. It said the outlook is negative.The ratings agency said the affirmation "reflects our assessment of Clydesdale's improved capital position [and is] supported by the broader de-risking and simplification of the franchise."S&P said it expected that revenue growth at the bank "will be limited and the net interest margin will remain broadly flat. The NIM should benefit from the run-off of more expensive term deposits, generally improved deposit margins, and further near term improvements in lending margins. "However, this will be largely offset as loan book re-pricing eventually runs its course and some of the benefits of improved funding margins are passed through to customers."It said the negative outlook "reflects the negative 'trend' that we have assigned to UK banking industry risk."