The Grauniad reports on physical assaults on Greenpeace activists
The floor traders (who are "self-employed") and security guards are reported to have assaulted the non-violent activists pretty severly.
As three Greenpeace climbers hung a banner from the roof declaring "Climate change kills. Stop pushing oil", more than a dozen people were hurt when angry traders pulled a large metal bookcase on top of protesters and guards waded in to punch and kick people trapped in corridors.