The British government is expected to publicly link China to cyberattacks that compromised the voting records of tens of millions of people, another notable hardening of Britain’s stance toward China since its leaders heralded a “golden era” in British-Chinese relations nearly a decade ago. The deputy prime minister, Oliver Dowden, will make a statement about the matter in Parliament on Monday afternoon, and is expected to announce sanctions against state-affiliated individuals and entities implicated in the attacks. The government disclosed the attack on the Electoral Commission last year but did…