British Prime Minister Rishi Sunak visits Kyiv, announces new $89 million air-support packageBritish Prime Minister Rishi Sunak has promised 125 anti-aircraft guns and other air-defence technology as he made an unannounced visit to Ukraine's snow-blanketed war-time capital for talks with Ukrainian President Volodymyr Zelenskyy.Key points:- Rishi Sunak sought to reassure Volodymyr Zelenskyy there would be no change of stance in the UK's support of Ukraine- The air-defence package includes radar and other technology to counter Iran-supplied exploding drones that Russia has used against Ukrainian targets- Ukrainian have been urged to temporarily leave the country in order to conserve powerThe air-defence package, which Britain valued at 50 million pounds ($89 million), comes as Russia has been pounding Ukraine's power grid and other key infrastructure from the air, causing widespread blackouts for millions of Ukrainians amid frigid weather.The UK has been one of the staunchest Western supporters of Ukraine's resistance to Russia's invasion, giving Kyiv 2.3 billion pounds in military aid.Former UK Prime Minister Boris Johnson, who stepped down in July amid ethics scandals, won wide praise in Ukraine for his backing and made repeated visits to Kyiv.The prime minister said it was "deeply humbling" to visit Kyiv "and to have the opportunity to meet those who are doing so much, and paying so high a price, to defend the principles of sovereignty and democracy.""