One thing that has not been made clear enough over the last few months is that the withdrawal agreement is merely a framework to help shape Brexit during the transition period, it is not the final deal, with May gone a different approach, perhaps a softer Brexit or revoking A50 are all still possible.
Paul, I read on Twitter (yes I know it’s Twitter!) that the police estimate is 2 million.
AFAIK the Met no longer publish their estimates (although things still “leak”, of course) and the Torygraph (predictably) is reporting the turnout was much lower.
Apologies if this has already been posted or if you have already seen it but I just got home and saw https://www.bbc.co.uk/news/uk-47680979
I was there, but this is extraordinary. If you saw my last post I have to recant - You do get a special view from the streets, but the view from the air is awesome.
I have no idea how true this is but crowd analysis experts (apparently there is such a thing) estimate the maximum amount of people to be around 625,000 and considerably less than a million. But still one of the biggest marches in London. Brexit March numbers
2-4 people per square metre sounds fair - I’d worked out a rough guesstimate using 4km for the length of the route and 1000 people in a 20x20m square - with the narrowest parts of the route at about the 20m and the widest 40m giving a very conservative estimate of about 300,000. In fact I think that the crowd density was a lot more than 1000 people in 40m2 in many places.
BUT, that is the “static” capacity of the route which was full from about 1:15 to at least 4:30 and some people said as late as 5:30 so there were possibly up to three “refreshes” of the static capacity as people marched along the streets. That helicopter footage was just a 9 minute snapshot of the march.
In short 2 million is almost certainly OTT but 1 million is really pretty plausible.