Theresa May will hold an emergency COBRA meeting on Monday over Iran (Image: GETTY)
Iran is considered behind only Russia and China as the greatest threat to Britain’s security from a state actor among senior players in MI5 and MI6. With the seizure of the British flagged Stena Impero oil tanker in the Persian Gulf, fears Tehran funded terror cells across Europe could be given the all-clear have intensified. The Daily Telegraph reported the cells are linked to Hezbollah, a Lebanese based political party and militant group, which is active in the Syrian Civil War.
It has been reported counter-terrorism police disrupted a cell in 2015 that was stockpiling tonnes of explosives.
Sources believe the cell was prepared to cause “a lot of damage” with "proper organised terrorism".
An intelligence source said: “Iran uses proxies and they have control of a network of individuals linked to Hezbollah.
“Iran has Hezbollah operatives in position to carry out a terrorist attack in the event of a conflict. That is the nature of the domestic threat Iran poses to the UK.”
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Iran has seized Stena Impero following the seizure of Grace I (Image: GETTY)
Tehran has been blamed for cyberattacks in the UK, one on MPs in 2017 and another on Post Office, local government and private sector emails at the end of last year.
The Department of Transport have claimed the Steno Impero was in Omani waters when it was seized before being re-routed by Revolutionary Guard special forces and produced naval charts to support this claim.