The German government stated that the report confirmed that pressure on Iran was working and that the pressure should be maintained.
Britain's foreign secretary David Miliband agreed Wednesday that Tehran was still refusing to bow to UN resolutions to halt uranium enrichment, which can be used to make bombs.
"That defiance remains the case," Miliband told reporters after talks in London with Chinese Foreign Minister Yang Jiechi, adding Britain and China were committed to non-proliferation.
"We will continue to work very closely together, secure in the knowledge that we are pursuing the shared goal of a more stable and peaceful world," he said.
Germany also said Iran's nuclear program remained a cause for concern. "The findings confirm what the German government has always said -- that diplomatic negotiations are promising," chief government spokesman Ulrich Wilhelm said.
"But you also know the reality that two UN Security Council resolutions have not been followed and that Iran has not yet stopped its uranium enrichment program."