John McCain, the presumptive Republican party nominee for President of the United States, is visiting London today.

The Senator from Arizona met with Prime Minister Gordon Brown at Downing St this morning and later had discussions with Conservative leader David Cameron.

“We expressed our great appreciation for the long-standing and unique relationship that exists between our two countries, our common values and our common efforts that are made by both countries on national security and others,” Senator McCain said after his meeting with Mr Brown.

“We discussed at length the issue of climate change, and my commitment to address the issue of climate change comprehensively and globally.”

He spoke of his admiration for the Prime Minister.

The two men held bilateral talks covering a range of issues including reform of international institutions, the global economy and the current situation in Iraq and also Afghanistan, said Downing St.

McCain, 71, is visiting France, Israel, Iraq and Jordan as part of a “fact-finding” mission ahead of the campaign for President.

While he has an unassailable number of delegates backing his nomination at the Republican party convention in September, his Democratic opponents appear unable to choose between Senators Hillary Clinton and Barack Obama.

Senator McCain, a former prisoner of war in Vietnam, also met Tory leader David Cameron today.

“Our conversation centred on Afghanistan where the Senator praised the incredible work being carried out by British troops,” said Mr Cameron.

“We also discussed the need for greater co-ordination among the military and various authorities there.

“The Senator and I also spent time discussing our shared interests and how we can broaden the appeal of moderate Conservatism.”

Americans will vote for a new President on November 4th.