President Bush flies to Britain this evening bringing with him a plane-load of negotiators under strict instructions not to negotiate on US opposition to the Kyoto global warming treaty or on Washington's plan to abandon the anti-ballistic missile treaty.
"On both issues I have made my positions clear," he said in a speech at the World Bank. "People shouldn't doubt where the United States stands."
In a BBC interview yesterday, Mr Bush said there was no chance that European leaders would persuade him to compromise on Kyoto.
He said pursuing the 1997 treaty was "not the proper way to proceed".
In the wake of a successful test of the planned missile defence system, the Bush White House believes it is in a strong negotiating position against calls from Russia and US allies in Europe for a halt in development of the anti-missile missile network, which, if built, would almost certainly torpedo the 1972 anti-ballistic missile (ABM) treaty.
The Pentagon plans to spend $8.3 billion on the project in the 2002 budget.
Asked by the BBC about the ABM treaty's future yesterday, Mr Bush said: "We need to set it aside. We need to move forward."
Mr Bush will stay overnight at the US ambassador's residence in central London. He will have lunch with Queen Elizabeth, visit the war room used by Winston Churchill in the second World War, and spend tomorrow night at the British Prime Minister, Mr Blair's country home north of London.
On Friday he will leave for Genoa, where elaborate security measures have been taken in anticipation of anti-globalisation protests.