The Editor at London Freelance writes:

"Photograpers report that one of their number, Marc Valeé, is today hospitalised following what first reports say was action by officers of the Metropolitan police in the vicinity of Parliament Square - thrown onto a kerbstone."

"One says he could not move his legs when he was put into the ambulance but it will be some time before we know whether this will heal."

Mike
e-mail:  editor@londonfreelance.org
Homepage:  http://www.londonfreelance.org

Another report on Indymedia said:
"The person taken to hospital in an ambulance was a photographer. He was grabbed by police and swung forcibly around by his arm, falling and hitting his head hard. He was reported to be having seizures before being treated by paramedics."

Journalists writing for the Evening Standard website 'This is London' said:
"a photographer was taken to hospital by ambulance after he was violently pushed to the ground by a policeman. "

A member of the NUJ LFB said:

"Marc is a professional photographer through and through. He's been documenting youth culture and protests for over ten years and produces striking images. He's an NUJ and British Press Photographers' Association member.

Some of his work:
 http://photoscrapbook.livejournal.com/
 http://www.protestphoto.co.uk
 http://www.flickr.com/photos/marcvallee/sets

I hope the police haven't caused him permanent injuries, as it sounds pretty serious.

Good luck Marc.