Looks like the newspaper of record is at it again with the chronic under-estimates of protest turnouts. The estimates in the newspapers listed by google range from 350,000 to "over half a million". Some keep it vague by saying "hundreds of thousands" or "tens of thousands", but the Times is the only one saying 100,000. Still, it's better that they covered it all. When 350 to 500,000 people came out to an anti-war protest in London, the Times ignored it in favour of a story on British education bureaucracy.