http://news.bbc.co.uk/2/hi/uk_news/england/london/7988828.stm<snip>
nitially, the pictures show Mr Tomlinson walking away from a group of police officers.
He lands heavily on the ground before remonstrating with police.
Daniel Sandford, BBC Home Affairs correspondent, said: "Campaigners have been saying all along that Mr Tomlinson's heart attack may have, in some way, been linked to how the police were treating protesters that evening.
"This is now going to raise some more serious questions about the police behaviour on that night.
"Why is it that one of the officers walks up to a man who appears to be walking away from him. He
does not look like he is 100% co-operative but he is not being uncooperative."
The Guardian newspaper obtained the footage and it plans to hand the video to the Independent Police Complaints Commission (IPCC).
An IPCC spokeswoman said: "The IPCC has been made aware of the footage broadcast on a national newspaper's website.