In November the Royal Navy's attack submarine, HMS Astute, surfaced near the Russian spy ship Yantar off the UK coast, issuing a stark warning against espionage activities targeting Britain's undersea cables. Defence secretary John Healey disclosed this rare manoeuvre, emphasising the UK's commitment to safeguarding its critical infrastructure. Yantar, officially classified by Russia as an oceanographic research vessel, is suspected of mapping undersea cables, raising concerns about potential sabotage. In response to its presence, the UK adjusted naval engagement protocols to allow warships and submarines to closely monitor such vessels. This week, Yantar re-entered UK waters, prompting the deployment of two warships and a patrol aircraft to track its movements continuously. NATO allies share apprehensions regarding Russia's activities near vital undersea infrastructure, especially following incidents like the Nordstream pipeline explosions. The alliance has deployed elite divers, submersible drones, and an array of ships to patrol and protect critical underwater assets in the Baltic Sea.