British intelligence officials are on the alert for such an attack that may serve as retaliation for both the UK response to a nerve agent attack on former Russian spy Sergei Skripal and his daughter as well as this weekend's strikes on Syrian chemical weapon storage facilities, development centers and bunkers -- in which the US, France and the UK all participated.

Intelligence sources told The Times that British politicians could be singled out in a Russian attack and that the nation's cyber-intelligence agency and the Ministry of Defense were prepared to retaliate "proportionately." "It wouldn't be impossible that they get through in some way that really hurts us. If they aggressively come after us, we will certainly have the ability to do some stuff to them. But unlike Russia, we abide by the law, so anything we do would be proportionately done," said one source. Another added, "They're more likely to revert to targeted information and try and cause as much embarrassment and chaos as possible."