North Korea is rumoured to be sending tens of thousands more troops to Russia in support of its war in Ukraine, marking a deepening of the two countries’ defence ties and a major escalation of Pyongyang’s involvement in the conflict, if confirmed.Late on Saturday, Ukrainian President Volodymyr Zelensky revealed that preparations had been under way in Russia’s Voronezh region to receive another 30,000 North Korean troops since last month.He also claimed Pyongyang was planning to send additional...