The spat between China and Britain over events in Hong Kong has escalated, with Britain summoning the Chinese envoy in London over remarks the British diplomatic chief called “unacceptable and inaccurate”.The summoning of Liu Xiaoming on Wednesday by the British foreign ministry came after Liu held a rare press conference denouncing recent comments on the protests in the former British colony from members of the British government.In the press conference, Liu said the Sino-UK relationship had…