The central bank sold 1.5 billion pounds of 91-day T-bills on behalf of the ministry at an average yield of 12.053 percent, up from 11.995 percent at last week's auction.

The bank also sold 1.75 billion pounds of 259-day T-bills, half of the amount it had offered, at an average yield of 12.991 percent, up from 12.912 percent at the last issue on Aug 16.

Copyright Reuters, 2011