The British government on Saturday promised for the first time to supply Ukraine with Challenger 2 battle tanks to fight Russian forces, as Moscow resumed missile attacks on the capital Kiev and other regions. Prime Minister Rishi Sunak delivered the pledge in a conversation with Ukrainian President Volodymyr Zelensky, the British leader’s Downing Street office said in a statement. A British government spokeswoman said the prime minister offered the tanks and additional artillery systems as a sign of London’s “ambition to intensify our support to Ukraine.” Sunak also welcomed similar announcem…