On a morning that should by rights have been frozen in time as a moment of pure pageantry, with military marching bands, pipers trucked out in tricorn hats and powdered wigs, and visiting royalty, one can count on George Bush.

The president yesterday once again demonstrated his gift for the gaffe, injecting an unintended sense of levity into the White House welcome for the Queen.

In his speech on the south lawn of the White House, he noted that the Queen had made repeated visits to the US during her reign, including celebrations to mark the country's 200th anniversary. "The American people are proud to welcome Your Majesty back to the United States, a nation you've come to know very well," Bush said. "After all, you've dined with 10 US presidents. You helped our nation celebrate its bicentennial in 17 - in 1976."

As the laughter rippled through the crowd of 7,000 invited guests corralled behind red, white and blue bunting, Mr Bush tried to make light of his slip.

He shot a quick look at the Queen, and said: "You gave me a look that only a mother could give a child."

But by then, Mr Bush's discomfort with the pageantry that a royal visit entails was an open secret. His wife, Laura Bush, told ABC television yesterday morning that she and the secretary of state, Condoleezza Rice, had to use all their persuasive powers to coax him into a white tie for the state banquet scheduled later yesterday.

It was to be the first white-tie event of his administration. "I don't know how thrilled he was about this - but, of course, when you're hosting the Queen of England, of course you want to have it be white tie," Mrs Bush said. "This is the perfect occasion for it - and he was a very good sport."

However, that sense of sportsmanship was not very evident at the White House yesterday morning when Mr Bush appeared to treat the visit by the Queen like that of any world leader, launching into a boiler plate address on the war on terror.

He praised Britain's historic contributions such as the Magna Carta in equal measure to its contribution in Iraq and Afghanistan. "Today our two nations are defending liberty against tyranny and terror. We're resisting those who murder the innocent to advance a hateful ideology, whether they kill in New York or London or Kabul or Baghdad," he said.

Mr Bush went on to pay tribute to the monarch's personal contribution in the war on terror. "Your Majesty, I appreciate your leadership during these times of danger and decision," the president said. "You've spoken out against extremism and terror. You've encouraged religious tolerance and reconciliation. You have honored those returning from battle and comforted the families of the fallen."

It was impossible to see the Queen's reaction from beneath her black and white hat, but the tone of her brief comments were in sharp contrast to those from Mr Bush. "A state visit provides us with a brief opportunity to step back from our current preoccupations to reflect on the very essence of our relationship," the Queen said.

"It is the moment to take stock of our present friendship, rightly taking pleasure from its strengths while never taking these for granted. And it is the time to look forward, jointly renewing our commitment to a more prosperous, safer and freer world."

With a wave from the portico of the White House, the Queen and Mr Bush then retreated inside the White House for a lunch of baby sea bass followed by raspberry meringue, and chocolate sorbet. But the focus was really on the state banquet later. The White House reportedly has been agog with preparations for the event, at which some 134 invited guests will dine on gold-trimmed china, and hear a performance from the violin virtuoso, Itzhak Perlman.

Mrs Bush has been ebulliant about the prospect. For Mr Bush, however, it's a different story. He likes to dine on Tex-Mex food and be in bed by 10pm.

Yesterday morning's remark was not his first slip in front of the Queen. When she visited the White House in 1991 during his father's presidency, he said he was the black sheep of the Bush family. He then asked: "Who's yours?"

The Queen did not reply. That awkward moment may well have been weighing on his mind in the run-up to last night's encounter.