Admiral Sir Ben Key said the Russian President would face a “huge cost to him and Russia” if he made the move.
He warned: “We represent a threat.
“The Russians effectively tried to exclude any other any other ships from operating in the northern part of the Black Sea and the Ukrainians demonstrated that that was not something that they could do freely.”
It comes as Ukrainian President Volodymyr Zelensky claimed Russia has fired more than 2,000 missiles at Ukraine since the invasion began.
FOLLOW BELOW FOR UPDATES…