Has the Russian submarine threat been diminished by the Ukraine war?

Navy Lookout – Head of the US Northern Command recently told Senators that Russia could have its most powerful Yasen (NATO name Severodvinsk) class attack submarines on persistent patrols off either of America’s coasts within two years which will “reduce decision space for a national senior leader in a time of crisis”. Here we look at these boats and the wider Russian submarine threat that is equally applicable to the UK and Europe.