Meanwhile, British Foreign Secretary William Hague also welcomed the deal as an important moment in international relations with Iran and in efforts to prevent nuclear proliferation on microblogging site twitter.
Hague tweeted that the agreement with Iran was good for the whole world, including Middle Eastern countries and the people of Iran themselves.
"This agreement shows it is possible to work with Iran, and through diplomacy address intractable problems," the tweet said.
"Negotiations were painstaking. Tomorrow hard work begins of implementing and building on the agreement," he tweeted Sunday.
