This epaulette business…..
When they’re wearing public order overalls, they don’t have numbered epaulettes on the shoulder like they normally would. The white ones show he is a sergeant, red ones identify an inspector, and I think it’s blue for really important people but you rarely see them. No one wears numbers there. I don’t know why that is, but they don’t. So when you see a policeman in public order overalls without numbers on his shoulder that’s because they were never there in the first place, not because he’s removed them. Different forces display numbers differently with public order kit, I have seen some with it one the front of their body armour, some with big stickers on the back of their helmets. Not all the police officers at the G20 protests were in public order kit so that is why you can see plenty with the normal numbered epaulettes and normal hats as well as the ‘riot’ police.
I have a set of police public order overalls (given to me via a few people) and it has Velcro patches where all the identification can be stuck on or removed if required. Removing or covering identification numbers in public order situations is nothing new.