Bryony Rosa claims in response to the video from Asif Khan:
"I was very near the front of the protest, and i'm pretty sure these weren't students. They all happened to come dressed in balaclavas, the police stood by and watched them do what they were doing, and there was even a middle-aged woman outside the offices before it all started with a megaphone saying that "this is the tory offices, you should stay here and protest!"."
Update on the Mash-up. Lots of face, lots of camera, centre of attention ftw!
UpUpdate: And yes, Donal Blaney, CEO of that spectacular 'Conservative madrassa' YBF is well up for it, with plenty of bluster.