The bank sold 1.5 billion pounds of 91-day T-bills on behalf of the Finance Ministry at an average yield of 11.928 percent, up from 11.907 percent at last week's auction.

It also sold 3.5 billion pounds of 273-day T-bills at an average yield of 12.932 percent, up from 12.858 percent at the last issue on Aug 2.

Copyright Reuters, 2011