London — The UK government has decided to ban the Chinese-owned social media app TikTok from being installed on work phones used by ministers and civil servants, in response to concerns about data security and deteriorating relations with Beijing. This decision represents a significant change from the UK’s previous stance and follows a cybersecurity review of TikTok that began in November. The ban will not apply to personal phones. The US and European Commission have already implemented similar bans, and the decision underscores the declining trust in China and TikTok among Western countries. TikTok has expressed disappointment and denied any wrongdoing.