Iran has been carrying out covert ballistic missile tests and rocket launches including testing missiles capable of delivering a nuclear payload, British Foreign Secretary William Hague said, Reuters reported.
He told parliament the tests were in clear contravention of U.N resolution 1929.
Iran, at loggerheads with the West over its nuclear program, is carrying out a 10-day military exercise in a show of strength it hopes will warn Israel and the United States against any attack.
As part of the exercise, it test-fired surface-to-surface missiles Tuesday with a maximum range of 2,000 km (1,250 miles).