Heavy casualties are being endured by both Ukrainian and Russian forces, British military intelligence has said, two weeks into the Ukrainian counteroffensive. The level of losses among Russian troops was said by British officials to be at its highest level since the peak of March’s battle for Bakhmut in the Donetsk region, with Ukraine claiming to have killed or injured 4,600 soldiers. Ukrainian deputy defence minister Hanna Maliar said Ukraine must prepare itself for a “tough duel” but that “the biggest blow is yet to come”. Separately she said that Russia had concentrated a significant number of units in the...