Obama snub denied by Brown camp
A diplomatic source has told the BBC that Downing Street was "frantic" over the weekend after repeated requests for a meeting between the prime minister and President Obama were turned down.
Earlier, the prime minister's official spokesman has described reports that the president had snubbed Gordon Brown's request for a meeting as "overplayed".
"A number of interactions have taken place in New York and the two men will be meeting again in Pittsburgh," he said.
In fact, the two leaders met for what is described in diplomatic circles as a "walk and talk" meeting in the kitchens of the UN last night, after the Leaders' Dinner. The meeting lasted only 15 minutes.
Traditionally, in recent years the British prime minister and US president have held a bilateral meeting at major summits followed by a news conference.
President Obama and Prime Minister Brown will be together at a meeting with Pakistan's president Zardari on Thursday and throughout the G20 summit in Pittsburgh.
However, the president has held bilateral meetings with the leaders of Japan, China and Russia and Mr Brown wanted a similar event.
This story has echoes of the prime minister's first visit to the Obama White House, when the Americans refused to hold the traditional full news conference and the president gave the Brown family a boxed set of DVDs - a gift which was widely criticised for being impersonal and cheap.
It is thought likely that in response to these headlines, the White House will now move publicly to reassure the British about the continuing strength of the special relationship.