LONDON CITY HALL staff will no longer have TikTok on their devices in the latest ban imposed on the Chinese-owned social media app over security concerns. The Greater London Authority (GLA) said the rule was implemented as it takes information security “extremely seriously”. It comes after the UK Government banned ministers from using the video-sharing app on their work phones following a security review. The House of Commons and the Lords also cited security concerns as they decided to ban the app across the Palace of Westminster. The Scottish Government is also imposing a ban on official devices over concerns...