TikTok is now the most popular single source of news for teenagers in the UK, according to research by Ofcom. The media regulator found that the video-sharing app is used by 28% of 12 to 15-year-olds for finding out about current affairs, a higher proportion than any other platform. YouTube and Instagram are joint second, with both used by 25% of those in the age group for the purpose, according to the regulator's News Consumption In The UK 2022/23 report. It comes as the internet increasingly replaces traditional print media as a news source among the general public. Some 68%…