Mr Bratteli is to visit the Soviet Union next month for talks with Government leaders.
An American delegation is due in Beijing later this month for talks on China's exchange rate policies.
All this is before Mrs. May meets other European Union leaders at a summit this month for talks that are likely to be difficult.
"The French government position was made perfectly clear when the prime minister went to France last month for talks with President Hollande – and our position is clear.
Mohamed ElBaradei, the director general of the International Atomic Energy Agency, the United Nations' nuclear monitor, met with Iranian officials this month for talks Dr. ElBaradei described as "frank and friendly".
Vice President Dick Cheney will visit Israel and 10 other countries next month for talks about terrorism and regional security, the White House announced today.
The research was published after the German chancellor, Angela Merkel, visited London this month for talks with Cameron, who is campaigning to reform EU freedom of movement.
Secretary of State Colin L. Powell first proposed the compromise during his visit here earlier this month for talks with Prime Minister Ariel Sharon of Israel, a senior Bush administration official said.
Abdoulaye Bio Tchane, the chief of the I.M.F.'s Africa division, was in Luanda this month for talks with President José Eduardo dos Santos, who has led Angola since 1979.
At the same time, British diplomats continued pressing Israel's leaders today to reconsider their decision to block a Palestinian delegation from traveling to London this month for talks aimed at reforming the Palestinian Authority.
