From the opposite perspective, of someone who was there: it was a massive crowd, with all kinds of people there from all over. "Grannies against Brexit" and babes in arms. Placards were displayed by military veterans against brexit, members of all the bloody political parties against it, people of lots of different cities and towns, and so forth, besides many others generally mocking the likes of BoJo and Farage, as well as TM, of course.
With all of the rhetoric that had been going around and all of the death threats that have been sent, I had anticipated there might be some kind of confrontation with counter-protesters, or even that the march might be the target of terrorist violence. In the event, the only counterprotester I saw was an oddly dressed character to one side of the march route on a stepladder, holding up a placard claiming that "The Bible Says that Britain and Europe have Different Destinies".
No doubt we will all be ignored, but it had to be done all the same.