An interesting question from Michael Gove yesterday:
Michael Gove: To ask the Secretary of State for Defence what assessment he has made of the extent of Iranian involvement in the internal affairs of neighbouring states where British armed forces are deployed; and if he will make a statement. 
Des Browne: Iran's behaviour in support of terrorist groups in the region continues to be a cause for concern.
Support from within Iran, including by the Quds Force, goes to groups who are attacking our forces and fuels the sectarian violence in Iraq. In our assessment some of the improvised explosive devices that are being used against our forces use technology that originates from Iran.
The Government of Iraq has made it clear that it will not tolerate Iranian activity that undermines the prospects for a secure, stable and democratic Iraq.