I am certainly impressed with claimed 150,000, joining a march organised by convicted criminals and known fascists, many of whom apparently joined for other reasons than the march was widely and clearly publicised for (I mean that's what one does isn't it? Join a march for say the abolition of the monarchy but claim that actually they marched for other unconnected reasons!) but not perhaps as impressive as the 1 million plus who marched against the Iraq war.

Though of course its highly possible that many of those didn't join the march for that reason but simply fancied marching through London, or made up their own reasons rather than appear to be anti war!