The Ukrainian military said on Saturday it had killed scores of Russian soldiers and destroyed two ammunition dumps in fighting in the Kherson region, the focus of Kyiv's counter-offensive in the south and a key link in Moscow's supply lines. Rail traffic to Kherson over the Dnipro River had been cut, the military's southern command said, potentially further isolating Russian forces west of the river from supplies in occupied Crimea and the east. Defence and intelligence officials from Britain, which has been one of Ukraine's staunchest allies in the West since Moscow's Feb. 24 invasion, portrayed Russian forces as struggling...