Report: UK denies US access to bases for Gulf buildup

As a result, providing assistance to U.S. forces potentially involved in a strike on Iran would violate international law, according to the Guardian.

“The UK would be in breach of international law if it facilitated what amounted to a pre-emptive strike on Iran," said a British defense official. “It is explicit. The government has been using this to push back against the Americans.”

The Obama administration has not made a formal request to the British government for military access. U.K. officials said they did not believe there was any movement toward a conflict, but that the United States was exploring the “British position” on the use of bases.

Pentagon officials did not immediately respond to request for comment on the report. A U.S. State Department official told the Guardian: "The U.S. and the U.K. co-ordinate on all kinds of subjects all the time, on a huge range of issues. We never speak on the record about these types of conversations."

The Obama administration says it wants a diplomatic solution to the Iranian nuclear dispute, although President Obama has said he will not rule out using military force to stop Iran from obtaining a nuclear weapon.

Iran insists that its nuclear program is for peaceful purposes only, while the United States and its allies suspect Iran is seeking nuclear weapons.

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