From Five Foot's website:
We topped out at about 100 people for the London "Stop over Spending" rally outside City Hall.
Frankly, I can't believe we had that many, under the circumstances: at points, the rain was blasting down in sheets, and the wind knocked a lot of our stuff around.
Frankly, I can't believe they had that many either. Applying the Shaidle deflation factor, and working through the math, I get 20 far right blogging nerdlingers, the voices in their heads, their mamma, several addled seniors, and a homeless guy that stumbled into the parking lot where the city stuck their pathetic display and was brutally clubbed to death in lieu of an actual Islamist.
This picture, from here, gives some idea of the "crowd" size.
Note also in these pictures the total absence of rain "blasting down". Note in this picture the actual presence of sunshine. And here's the weather for that day; the rain avoided their little rebellion nicely.
Finally, it appears "the black guy" didn't show. Probably got within 100 yards of this gang and heard banjos playing the theme from Deliverance.