By Xinhua
Washington : US President George W. Bush continued Monday his talks with British Prime Minister Gordon Brown on issues of "shared interest and concern" at Camp David.
Speaking to reporters after his first talks with Bush at Camp David, Brown expressed the belief that Britain-US relations will "strengthen" in coming years.
"The United Kingdom and the United States work in a partnership that I believe will strengthen in the years to come," Brown said at a joint press conference with Bush at the US presidential retreat.
On Iran, Brown said that he and Bush had agreed to pursue tougher sanctions against Iran over its nuclear programme.
"On Iran, we're in agreement that sanctions are working and the next stage we are ready to move towards is to toughen the sanctions with a further UN resolution."
In addition, the two leaders also agreed to "step up" pressure to end violence in Sudan's Darfur province.
Brown, accompanied by Foreign Secretary David Miliband, flew in here late Sunday and then headed straight to Bush's Camp David, Maryland retreat, for a private dinner and brief meeting, US officials said.
The two leaders focused on thorny issues, ranging from terror threats, wars in Iraq and Afghanistan, Iran's nuclear crisis, the status of the breakaway Serbian province of Kosovo, and the conflicts in Darfur, Sudan.
This is Brown's first visit to the US since he became prime minister after his predecessor Tony Blair stepped down late last month.
Blair has close relationship with Bush. His departure after 10-year at the helm was believed to be a result of increasing public opposition to his support for the US-led war in Iraq.
After the change of Britain's leadership, all eyes are on how Brown treats the relations between London and Washington.