London police issued a video for general public with a guidance on how to react in the situation of the terrorist attack: RUN, HIDE, TELL. Run. Hide. Tell. This is the official guidance for what to do if you're caught up in a terror attack. #LondonAttacks https://t.co/FHSRIYo6wJ pic.twitter.com/FFJBYB81ks — BBC News (UK) (@BBCNews) June 4,…