I was "caught up" in this.
By "caught up", I mean trying to walk down the road whilst 30 screaming idiots ran in the opposite direction. This was a full 20 minutes AFTER the Met had tweeted there was no shooter, no bomb, no casualties (i.e. nothing happened).
What amazes me is the people who had been all over social media claiming to have heard gunshots, explosions etc. Some even claimed to have seen people being shot. How sad do you need to be to fabricate a terrorist attack to get attention on social media? How much Police time was wasted by these false reports?