British security services have uncovered a "staggeringly reckless campaign" of Russian sabotage in Europe, that comes as Russia also resorts to nuclear sabre-rattling to deter countries from backing Ukraine,

The head of MI6 says British security will be "jeopardised" if Putin is allowed to succeed in Ukraine, as he warned the spy agency has already uncovered a Russian sabotage campaign in Europe. Send us your war questions for our experts below.

The head of Britain’s foreign intelligence service says Russia is conducing a “staggeringly reckless” sabotage campaign against Ukraine’s allies that risks dangerously escalating the conflict

"I think we have to face up to the fact that the Russians think they're in a state of war with us," Richard Dearlove, the former head of MI6, told Sky News on Nov. 27.

Europe may already be at war with Russia, says a former British intelligence chief. Richard Dearlove, who led MI6 from 1999 to 2004, believes the conflict has expanded beyond Ukraine, according to Digi24.