Time ran out months ago. Jack Straw telling the US military action isn't feasible is nonsense. Would he prefer to live under the imminent threat of Iranian nuke attack? That's what would happen if the world stood by and did nothing. Eventually, Iran would demand total compliance to Jihad or you'd be nuked. How long would the queen last? They'd nuke Buckingham palace and Parliament right after DC and the White House.
I expect that if Iran gets the nuke, they're going to issue an ultimatium, merciful souls that they are. US out of Iraq, and Jews out of Israel, or else.