12.10pm: Elizabeth Draper, an MA student at University College London, has written to say she was one of the protesters kettled in Parliament Square. She too was "disgusted" with the police's tactics. She writes:
Live blog: email
We were told at 8.30pm that the police would lead us across Westminster bridge and then let us leave, but we were actually held on the bridge until 11pm. I estimate that there were at least 2,000 of us. People were fainting from being so crushed, and from not having eaten since before we arrived at Parliament Square. We were told nothing about why we were being held there, and, as frustration understandably rose, people began to push forward. Were the police waiting for someone to be crushed, to break a limb, or to be pushed over the edge of the bridge by the force of people behind them?
I was quite close to the police line, and could not stop myself being pushed towards them. I saw people being hit and forcibly pushed back even though they were not the ones doing the pushing. Most of us were not trying to cause trouble, just get home, and the police tactics caused problems rather than solving them.
In the comments below (9.42am), raindance77 tells a similar story:
Violent thugs? I am a 21-year-old literature student and I am a protester. I danced to music on Parliament Square as people spray painted NO on the grass, I shouted 'tory **** tory ****' with pride, I got pushed to the police front line and charged by horses on two occasions (please see footage of charges on 24th and 9th). I am not ashamed.
If you want to look at thugs then look to to the police.
I am a girl of five foot two, I was pushed several times in the face, dragged on the floor and laughed at by police when I told them I had asthma. This is why people get angry, because people were being trapped and wanted to get out.
All afternoon we were told people were able to leave from various places but this was just not true.
I asked a policeman were I could go to the toilet; he pointed at the floor by his feet.
Another shouted: "Move, bitch, or I'll squash you with my horse."
Eventually, when the protests had died down and people were desperate to go home, a group of around 1,000 protesters were finally escorted to Westminster Bridge to exit; however this was a trick. What then happened was we were held on the bridge for hours in the freezing cold. The crowd remained calm, but after hours of freezing people began to chant "let us out" and then the crowd pushed forwards. Being small I was carried by the crowd and ended up by the police line. I was tired and cold and hadn't eaten for 12 hours or had any water.
I screamed at the police not to hurt me because I was being pushed but they still went for my face, almost pulling me to the floor. A man to my right put his arms over my face, screaming, "Leave her alone, she's a girl, she's not harming you," but the police began to hit him several times on the head.
When we were finally let off the bridge it was one at a time through huge crowds of jeering officers. We were told we were being photographed in case we had damaged royal car. But how this could have happened whilst we were kettled in parliament i don't know.
What I will say is that by this stage the anarchists had fought their way out, and just lots of women and children were left to freeze.