Following the G20 protests in London, the Guardian has received video footage from a number of people that appears to show police using excessive force or questionable tactics in dealing with demonstrators and the press.

The best-known video was sent by a New York fund manager early last week. It shows Ian Tomlinson, who was attempting to return home on the evening of the first day's protests, on 1 April, being pushed to the ground by a police officer.

Here is a list of the 14 videos received over this period, displayed in chronological order according to when the events took place. The Guardian is passing any newly obtained footage to the Independent Police Complaints Commission, with the permission of those who shot the films.

Note: Most of the video footage contains violence, and some include swearing.





1 April, 1.10pm, Threadneedle Street, City of London

As police push against protesters close to where windows were smashed in a branch of the Royal Bank of Scotland shortly afterwards, two officers wearing the shoulder insignia of medics can be seen using their batons to strike members of the crowd a series of times.

1 April, Threadneedle Street, between 1pm and 2pm

Credit: Ian Pons Jewell guardian.co.uk

As riot police attempt to push back protesters they complain they are trapped and cannot move. In the crush, one man near the front of the police lines appears to receive a kick, with bystanders claiming this was delivered by a police officer. The man responds by seemingly spitting and is wrestled away by police.

1 April, 5.29pm, near Bank, City of London

Credit: Jason Parkinson guardian.co.uk

Police seeking to clear demonstrators charge, with batons raised, at a group consisting mainly of press photographers and camera crews. After the charge one photographer, wearing an orange high-visibility jacket, can be seen on the ground.

1 April, around 7.15pm, Threadneedle Street, near Royal Exchange

Credit: Nadia Katz-Wise guardian.co.uk

As police try to move protesters away down the street, a police handler appears to allow his dog to bite the arm of a man wearing a pale hooded top who has just turned his back to the officers.

1 April, around 7.15pm, Royal Exchange Passage, near Bank of England

In footage shot by a worker trying to walk home, who was not involved in the protests, police can be seen tackling demonstrators. Near the end of the short sequence it appears that one officer pulls someone – possibly a woman – violently to the ground.

1 April, around 7.15pm, Bishopsgate

Credit: James Bayliss-Smith guardian.co.uk

As police try to clear protesters from the climate camp, a young man with long hair is at the front of the crowd, facing riot police. Shortly after he turns away from the officers one policeman strikes him on the side of the head with his shield, apparently using some force.

1 April, 7.20pm, Royal Exchange Passage

Ian Tomlinson is seen walking away from officers with his hands in his pockets. One of the police strikes him on the back of the leg with a baton before shoving him to the ground. Tomlinson is helped to his feet by bystanders. He collapsed soon afterwards and died.

1 April, 7.40pm, Bishopsgate, just south of Liverpool Street station

Credit: Rikki Blue guardian.co.uk

Lines of riot police can be seen advancing on people who had been taking part in the climate camp protests, in which demonstrators erected tents across a street in the City. The riot officers can be seen shoving people back with their shields as well as striking people with batons and, at times, the edges of their shields. Most protesters put their hands in the air to indicate non-resistance, and chant: "This is not a riot."

1 April, 9.49pm, southern end of Bishopsgate, City of London

Credit: Luke Allen/ reelnews.co.uk guardian.co.uk

Riot police, in the process of clearing people from the so-called Climate Camp, established that morning by anti-gobal warming protesters, can be seen pulling a series of people with some force through a cordon of officers. One man, who appears to be offering no resistance, steadies himself after being pulled through the cordon before he is struck on the head with the edge and front of a riot shield.

2 April, around 1pm to 2pm, close to the Bank of England

Credit: Chris Dowdeswell guardian.co.uk

A cameraman repeatedly asks a City of London police officer to say his badge number. The officer repeatedly refuses by saying only, "Bishopsgate police station," later adding, "If you go there then you'll be able to find out who I am." The cameraman asks: "What - do you expect me to stand outside and wait?"

• Additional research by Grace Boyle

• Watch part 2 of G20 protest videos obtained by the Guardian