Britain is expected to announce a ban on the Chinese owned video-sharing app TikTok on government mobile phones imminently, bringing the UK inline with the US and European Commission and reflecting deteriorating relations with Beijing. The decision marks a sharp reverse from the UK’s previously relaxed position, but some critics and experts said Britain should also extend the ban to cover personal phones used by ministers and officials – and even consider a complete ban. An announcement is expected from the Cabinet Office potentially as soon as Thursday, sources said,…