It’s telling that at least one London demonstrator interviewed by The Observer basically disagreed with the theme of the march:
“I’m not really against the occupation; I don’t think we should pull out,” said Laura Parry, from Leeds. “I’m here because Tony Blair sneered at us after the 15 February march. I want to show him we haven’t forgotten that,” she added. “This is more an expression of muted anger.”
The Observer generously estimated the crowd at “up to 100,000,” depending on whom you talked to.