How the British are protecting themselves from the Russian threat in their waters

It doesn't need to be a very sophisticated attack to do great damage, so an old ship dragging an anchor can do damage to a cable. The actions of Russia, of ships like the Yantar in the waters around Europe, are part of the hybrid warfare concept...The network [of cables] is vulnerable. You can't monitor every metre, every centimetre of the network at all times. And so it is relatively easy for an adversary to damage."