just seen the video
protestor may or may not needed nicking for his actions earlier no idea
but as not a threat could either have been left for later fit team take his photo well knownb so not going to get away.
Or if there was some pressing reason why he had to be arrested? copper could have just got behind him and wheeled him off at speed.
Thr pc wwas a violent twat and even got told to do one by another copper when a understanable fracs started.
I presumed like littlebrain was he was in the front rank at the time and got dragged out the way I am Sorry and wrong.
The copper was acting like a cunt and made everything worse.