What you are seeing in this photo below is some woke, smart-arse, numpty, up on a gantry crossing the very busy M25 motorway, with over a dozen policemen standing around below, gawping at him, having stopped all flow of traffic.
The M25 is the ring-road around London, and is its major artery.
As far as I can see there are only two questions.
1. Why should one person climbing on a gantry stop traffic? I'm sure he presents no danger to motorists whatsoever.
2. Why are all those policemen doing nothing? Either go and bring him down, or if he refuses, just handcuff him to the gantry and get on with proper crime-solving. It ain't rocket bloody science!