Nobody has mentioned Liverpool's River Fedtival was on at the same time and attracts 100,000's of visitors over the Weekend.
https://www.theriverfestival.co.uk ( let's go and watch the parade)
So, a perfect storm. Sunday, River Festival, etc.
Another interesting thing. First it was 500,000, then it jumped by 250,000 to 750,000(Joe Anderson, the leader of LCC, stated that figure), then it went over 750,000.
Liverpool's population is 450,000, so they were all there, including Everton fans. Or the Merseyside population is just over 2,000,000, so 1/3 of them were there. The whole route, and the full length of the Strand, should have been rammed. But it wasn't. The section of the Strand near the Liver building looked good. But that was close to the end of the parade, and close to the River Festival. The end of the strand near Princes Dock, which is the beginning of the Strand was basically empty.
I smell Scouse bullshit. Well done Joe. Great bit of PR for quoting that 750,000 parade figure, that has gone viral. As the leader of the city council, you have done a great job.