British spy chiefs have grave doubts that Iran has mothballed its nuclear
weapons programme, as a US intelligence report claimed last week, and
believe the CIA has been hoodwinked by Teheran.

Analysts believe that Iranian staff, knowing their phones were tapped,
deliberately gave misinformation

The timing of the CIA report has also provoked fury in the British
Government, where officials believe it has undermined efforts to impose
tough new sanctions on Iran and made an Israeli attack on its nuclear
facilities more likely.

The security services in London want concrete evidence to allay concerns
that the Islamic state has fed disinformation to the CIA.

The report used new evidence - including human sources, wireless intercepts and evidence from an Iranian defector - to conclude that Teheran suspended the bomb-making side of its nuclear programme in 2003.