Sir Keir Starmer warned there was a risk of the Middle East crisis spiralling beyond the region after Donald Trump ordered US planes and submarines to attack Iran's nuclear programme.
The Prime Minister urged all sides to return to negotiations but said he had taken 'all necessary measures' to protect British interests in the region if the conflict escalates.
He spoke out ahead of a Cobra meeting this afternoon, as Tehran vowed to retaliate for the strike on three facilities in the heart of the country.
Business Secretary Jonathan Reynolds confirmed this morning that the UK was told about the airstrike in advance but played no role in it.
But he said it would be 'naïve' not to expect the UK to face a heightened risk from the already high risk of Iran-sponsored terrorism in the wake of what was happening.
