I think the idea is probably to encourage the Iranians to push ahead with trying to develop atomic weapons as a way of deterring invasion. The object being to use this as an excuse for an attack on Iran.

Very similar to the game played over Iraq really over the non-existent Weapons of Mass Destruction, as a way of tricking people into going along with the invasion.

I think that if an attack on Iran is set in motion by the USA it will make what has happened in Iraq seems like a minor hiccup. And neither Tony Blair nor anyone else will be able to deliver the UK as a supporting partner this time, even if they wanted to. Not a chance.