Ukraine has hailed its first substantial battlefield advances in six months as its president, Volodymyr Zelenskyy, won pledges for new, long-range drones in Britain to add to a haul of Western arms for a counteroffensive against Russian invaders.
Since last week, the Ukrainian military has started to push Russian forces back in and around the embattled city of Bakhmut, its first significant offensive operations since its troops recaptured the southern city of Kherson in November.
