Didn't see much from my office as the marchers went a couple of hundred yards away. The security presence (non-police) was far less than on the Stop the City protests of a few years ago. There were a few protestors in fancy dress wheeling a stuffed zebra around the Gherkin sticking posters to the windows which were removed by a security card following a few feet behind. Apparently another group tried to storm the Gherkin but fell apart when they found they were at the back where there was just a cafe and bar.

I thought the fake armoured car was a great ruse.