What was the atmosphere like actually once you are there?
It was cold! I was glad we finished on time.
It was surprisingly chilled. People from both sides were wandering into Greggs and Wetherspoons with no visible hostility. Which shows they know full well we are not actually fascists.
Most demonstrations are actually pretty relaxed in general. Even on the rare occasion there is a scuffle, it is always very easy to keep away from the spot where it's happening.
I remember after the poll tax riot in 1990-whenever-it-was, thousands of people returned home with no idea there had been any trouble.