My 15yo daughter was at this party.
The guard had asked somebody to leave- he refused, and he and his mates started to attack the security guards.
One was pushed down the stairs, broke his ankle, and continued to get kicked in the face and body.
In the picture accompanying the article, the guard looks a lot better than he did at the time. His face was too swollen even to see his eyes.
My daughter was the only person in the room who jumped in to try and pull off an attacker- hitting him in the head with her metal purse. Everybody else, even the boys, stood back. Even after she jumped in nobody else did. It was only when the police arrived that the attack stopped.
The instigators were jailed.