A similar majority said they believe that Bush has done enough to win support from other nations. More than two-thirds said his policies on Iraq are right, but fewer than half are strongly convinced.

The poll also showed the White House has won the battle for American opinion about the role of the UN. Three-quarters said they disapproved of the way the UN has handled the Iraqi crisis, up from slightly more than half three weeks ago.

A poll published in The Guardian newspaper on 18 March showed that support for war had risen by nine percentage points to 38 per cent from 29 per cent a month ago, according to an ICM/Guardian opinion survey conducted on 14-16 March. Disapproval of war has fallen by 8 per cent to 44 per cent.