If the Brits are as dumb as we are, they can be fooled into supporting anything. The media will hype the whole nuclear threat Iran poses, or maybe the intelligence agencies will stage something in Israel and blame it on Iran, or something of the sort. Or maybe Iran will shoot down a plane or fire on a ship in Hormuz -- for real, not like Cheney trying to stage something.
As long as there is a perceived threat, the Neo-Cunts can get anything done.