Mr.Bishie
pickled egg
This, from that tweet - "The police charged at protestors well before there was violence. This is what caused the protest to become violent." - is incorrect, having watched the live coverage, bottles & other objects were raining down on the cops in-front of the Downing Street gates, and flares launched at them.
That's when the riot cops came out to replace the ones in standard uniforms, then the mounted police went in, you can see in that video the 'guard' had already changed outside the Downing Street gates, before the horses were used.
It was just evidence for Petcha that mounted plod did charge.