Europe's efforts to make ready its armed forces in anticipation of a major conflict with Moscow have broken new ground as the Russia-Ukraine war entered a new phase this weekend following a historic operation by Kyiv's security service.

Ukraine on Sunday pulled off an unprecedented attack in which swarms of kamikaze drones emerged from strategically placed trucks to demolish dozens of military aircraft at four separate airbases across the Russian Federation.

The breathtaking offensive, codenamed 'Operation Spiderweb' by Ukraine's SBU security service and personally overseen by President Volodymyr Zelensky - was so devastating that Russian military bloggers termed the operation 'Russia's Pearl Harbor'.

Now, as a furious Vladimir Putin plots his response, European leaders and defence chiefs are working to ensure their militaries can meet any threat from Moscow head-on.

Prime Minister Sir Keir Starmer on Monday vowed to make the UK 'battle-ready' while committing to building 12 new nuclear-powered submarines and at least six new munitions factories as part of the government's Strategic Defence Review.